[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:2883":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":11,"polytypeof":11,"groupid":12,"weighting":13,"nolocadd":14,"blacklisted":14,"mindat_formula":15,"mindat_formula_note":11,"ima_formula":16,"elements":17,"sigelements":25,"key_elements":26,"impurities":27,"cim":28,"ima_status":29,"ima_notes":11,"ima_history":11,"approval_year":11,"publication_year":32,"discovery_year":33,"strunz10ed1":34,"strunz10ed2":35,"strunz10ed3":36,"strunz10ed4":37,"dana8ed1":38,"dana8ed2":39,"dana8ed3":40,"dana8ed4":40,"csystem":41,"cclass":42,"spacegroup":42,"spacegroupset":43,"a":44,"b":45,"c":46,"alpha":43,"beta":47,"gamma":43,"aerror":48,"berror":48,"cerror":49,"alphaerror":11,"betaerror":49,"gammaerror":11,"va3":11,"z":50,"csmetamict":14,"commentcrystal":11,"twinning":51,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":52,"tlform":53,"hmin":54,"hmax":55,"hardtype":11,"vhnmin":43,"vhnmax":43,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":56,"dmeas2":57,"dcalc":58,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":11,"lustretype":59,"commentluster":11,"diapheny":60,"streak":61,"colour":62,"commentcolor":63,"colors":64,"streak_colors":70,"luminescence":11,"uv":11,"cleavage":71,"cleavagetype":72,"fracturetype":73,"tenacity":74,"commentbreak":11,"opticaltype":75,"opticalsign":76,"opticalalpha":77,"opticalalpha2":78,"opticalalphaerror":11,"opticalbeta":79,"opticalbeta2":80,"opticalbetaerror":11,"opticalgamma":81,"opticalgamma2":82,"opticalgammaerror":11,"opticalomega":43,"opticalomega2":43,"opticalomegaerror":11,"opticalepsilon":43,"opticalepsilon2":43,"opticalepsilonerror":11,"opticaln":43,"opticaln2":43,"opticalnerror":11,"optical2vcalc":83,"optical2vcalc2":84,"optical2vcalcerror":11,"optical2vmeasured":83,"optical2vmeasured2":85,"optical2vmeasurederror":11,"rimin":86,"rimax":87,"opticaldispersion":88,"opticalpleochroism":89,"opticalpleochorismdesc":90,"opticalbirefringence":11,"opticalcomments":11,"opticalcolour":11,"opticalinternal":11,"opticaltropic":11,"opticalanisotropism":11,"opticalbireflectance":11,"opticalextinction":11,"opticalr":11,"specdispm":11,"ir":11,"electrical":91,"magnetism":11,"thermalbehaviour":11,"other":11,"industrial":11,"occurrence":92,"otheroccurrence":93,"type_specimen_store":94,"description_short":95,"aboutname":96,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":97,"reviewed_at":11,"variety_of":11,"varieties":98,"group_members":99,"associates":129,"confused_with":155,"type_localities":156,"occurrence_total":163,"citations":164,"images":241,"structures":703,"synonyms":716,"language_names":721,"wikidata_qid":786,"texts":787},2883,"1:1:2883:3","23c829e5-ba32-4149-9b99-57692bef1ce8","Neptunite","Npt",0,"mineral",null,39911,7188,false,"KNa\u003Csub>2\u003C\u002Fsub>Li(Fe\u003Csup>2+\u003C\u002Fsup>)\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>[Si\u003Csub>4\u003C\u002Fsub>O\u003Csub>12\u003C\u002Fsub>]\u003Csub>2\u003C\u002Fsub>","KNa\u003Csub>2\u003C\u002Fsub>LiFe\u003Csup>2+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>Si\u003Csub>8\u003C\u002Fsub>O\u003Csub>24\u003C\u002Fsub>",[18,19,20,21,22,23,24],"Fe","Li","Na","Si","Ti","O","K",[18,19,20,21,22,23,24],[19,22],",Ca,","14.9.26",[30,31],"APPROVED","GRANDFATHERED",1893,"1893","9","E","H","05","70","4","1","Monoclinic",3,"0","16.427","12.478","9.975","115.56",2,1,4,"Interpenetrant on {301}","Prismatic crystals","Crystals from mm-sized up to 3-4 cm large, on aegirine or embedded in feldspar",5,6,"3.19","3.23","3.24","Vitreous","Opaque","Cinnamon-brown","Black to dark red","Deep blood-red in splinters",[65,66,67,68,69],"black","red","brown","yellow","orange",[67],"on {110}","Perfect","Conchoidal","brittle","Biaxial","+","1.69","1.6908","1.6927","1.7","1.7194","1.736","36","56","49",1.69,1.736,"r \u003C v strong","Visible","X= pale yellow\r\nY= yellow-orange\r\nZ= red-orange to red-brown","Piezoelectric","Nepheline syenite pegmatite","alkaline rocks","University of Copenhagen, Copenhagen, Denmark.","The Fe(II) analogue of manganoneptunite.\r\nRarely a minor rock forming mineral in alkaline pegmatites. Best known in association with benitoite in natrolite veins from California.","For Neptune, Roman god of the sea, for its close association at its type locality with aegirine (named after Aegir, a Scandinavian sea god).","2026-05-16 10:20:40",[],[100,107,115,123],{"id":101,"name":102,"entrytype":9,"csystem":41,"ima_formula":103,"mindat_formula":104,"hmin":54,"hmax":55,"dmeas":11,"dcalc":105,"primary_image_id":106},39449,"Magnesioneptunite","KNa\u003Csub>2\u003C\u002Fsub>Li(Mg,Fe)\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>Si\u003Csub>8\u003C\u002Fsub>O\u003Csub>24\u003C\u002Fsub>","KNa\u003Csub>2\u003C\u002Fsub>Li(Mg)\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>[Si\u003Csub>4\u003C\u002Fsub>O\u003Csub>12\u003C\u002Fsub>]\u003Csub>2\u003C\u002Fsub>","3.15",15090,{"id":108,"name":109,"entrytype":9,"csystem":41,"ima_formula":110,"mindat_formula":111,"hmin":54,"hmax":55,"dmeas":112,"dcalc":113,"primary_image_id":114},2564,"Manganoneptunite","KNa\u003Csub>2\u003C\u002Fsub>LiMn\u003Csup>2+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>Si\u003Csub>8\u003C\u002Fsub>O\u003Csub>24\u003C\u002Fsub>","KNa\u003Csub>2\u003C\u002Fsub>Li(Mn\u003Csup>2+\u003C\u002Fsup>)\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>[Si\u003Csub>4\u003C\u002Fsub>O\u003Csub>12\u003C\u002Fsub>]\u003Csub>2\u003C\u002Fsub>","3.17","3.26",30156,{"id":116,"name":117,"entrytype":9,"csystem":41,"ima_formula":11,"mindat_formula":118,"hmin":119,"hmax":11,"dmeas":120,"dcalc":121,"primary_image_id":122},471009,"Rotherkopfite","KNa\u003Csub>2\u003C\u002Fsub>Fe\u003Csup>2+\u003C\u002Fsup>(Fe\u003Csup>2+\u003C\u002Fsup>)\u003Csub>2\u003C\u002Fsub>(Ti\u003Csub>1.5\u003C\u002Fsub>Fe\u003Csup>2+\u003C\u002Fsup>\u003Csub>0.5\u003C\u002Fsub>)[Si\u003Csub>4\u003C\u002Fsub>O\u003Csub>12\u003C\u002Fsub>]\u003Csub>2\u003C\u002Fsub>",4.5,"3.20","3.271",21211,{"id":124,"name":125,"entrytype":9,"csystem":41,"ima_formula":126,"mindat_formula":127,"hmin":128,"hmax":55,"dmeas":43,"dcalc":58,"primary_image_id":11},11461,"Watatsumiite","LiNa\u003Csub>2\u003C\u002Fsub>KMn\u003Csub>2\u003C\u002Fsub>V\u003Csub>2\u003C\u002Fsub>Si\u003Csub>8\u003C\u002Fsub>O\u003Csub>24\u003C\u002Fsub>","KNa\u003Csub>2\u003C\u002Fsub>Li(Mn\u003Csup>2+\u003C\u002Fsup>)\u003Csub>2\u003C\u002Fsub>V\u003Csup>4+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>[Si\u003Csub>4\u003C\u002Fsub>O\u003Csub>12\u003C\u002Fsub>]\u003Csub>2\u003C\u002Fsub>",5.5,[130,137,147],{"id":131,"name":132,"entrytype":9,"csystem":41,"ima_formula":133,"mindat_formula":133,"hmin":55,"hmax":55,"dmeas":134,"dcalc":135,"primary_image_id":136},31,"Aegirine","NaFe\u003Csup>3+\u003C\u002Fsup>Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>6\u003C\u002Fsub>","3.5","3.576",257,{"id":138,"name":139,"entrytype":9,"csystem":140,"ima_formula":141,"mindat_formula":142,"hmin":143,"hmax":42,"dmeas":144,"dcalc":145,"primary_image_id":146},2813,"Murmanite","Triclinic","Na\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>Na\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>O\u003Csub>4\u003C\u002Fsub>(H\u003Csub>2\u003C\u002Fsub>O)\u003Csub>4\u003C\u002Fsub>","Na\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)O\u003Csub>2\u003C\u002Fsub>·2H\u003Csub>2\u003C\u002Fsub>O",2.5,"2.76","3.00",30239,{"id":148,"name":149,"entrytype":9,"csystem":150,"ima_formula":151,"mindat_formula":151,"hmin":48,"hmax":143,"dmeas":152,"dcalc":153,"primary_image_id":154},4181,"Villiaumite","Isometric","NaF","2.79","2.81",27470,[],[157],{"id":158,"txt":159,"latitude":160,"longitude":161,"country":162},1961,"Narssârssuk pegmatite, Narsaarsuk Plateau, Igaliku, Kujalleq, Greenland",61.0330556,-45.3777778,"Greenland",50,[165,169,173,176,179,183,187,192,196,200,205,210,214,219,224,228,232,236],{"id":166,"year":32,"html":167,"doi":168},432336,"Flink, Gust. (1893) Om några mineral från Grönland. \u003Ci>Geologiska Föreningen i Stockholm Förhandlingar\u003C\u002Fi>,  15 (4) 195-208 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1080\u002F11035899309442185'>doi:10.1080\u002F11035899309442185\u003C\u002Fa>","10.1080\u002F11035899309442185",{"id":170,"year":171,"html":172,"doi":11},15936803,1909,"Ford, W.E. (1909) XVI - Neptunite Crystals from San Benito County, California. \u003Ci>The American Journal of Science\u003C\u002Fi>,  S. 4 Vol. 27. 235-240",{"id":174,"year":171,"html":175,"doi":11},16118382,"Hlawatsch, C. (1909) Bemerkungen zum Aragonit von Rohitsch, Natrolit, und Neptunit von S. Benito. Tschermaks mineralogie und petrographische Mitteilungen: Band 28: 293-296.",{"id":177,"year":171,"html":178,"doi":11},16118385,"Bradley, W.M. (1909) On the analysis of the mineral neptunite from San Benito County, California. American Journal of Science, 4th Series: 28: 15-16.",{"id":180,"year":171,"html":181,"doi":182},103083,"Ford, W. E. (1909) Neptunitkrystalle von San Benito County, Californien. \u003Ci>Zeitschrift für Kristallographie\u003C\u002Fi>,  46 (1-6). 321-325 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1909.46.1.321'>doi:10.1524\u002Fzkri.1909.46.1.321\u003C\u002Fa>","10.1524\u002Fzkri.1909.46.1.321",{"id":184,"year":171,"html":185,"doi":186},103096,"Bradley, W. M. (1909) Analyse des Neptunits von San Benito County, Californien. \u003Ci>Zeitschrift für Kristallographie\u003C\u002Fi>,  46 (1-6). 516-517 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1909.46.1.516'>doi:10.1524\u002Fzkri.1909.46.1.516\u003C\u002Fa>","10.1524\u002Fzkri.1909.46.1.516",{"id":188,"year":189,"html":190,"doi":191},637936,1911,"Schaller, W. T. (1911) Mineralogical notes, series 1. \u003Ci>Bulletin\u003C\u002Fi> 490. US Geological Survey 109 pp. \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3133\u002Fb490'>doi:10.3133\u002Fb490\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Fpubs.usgs.gov\u002Fbul\u002F0490\u002Freport.pdf' class='refpdflink'>\u003C\u002Fa>","10.3133\u002Fb490",{"id":193,"year":189,"html":194,"doi":195},103186,"Schaller, W. T. (1911) Krystallographische Notizen über Albit, Phenakit und Neptunit. \u003Ci>Zeitschrift für Krystallographie\u003C\u002Fi>,  48 (1-6). 552-560 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1911.48.1.552'>doi:10.1524\u002Fzkri.1911.48.1.552\u003C\u002Fa>","10.1524\u002Fzkri.1911.48.1.552",{"id":197,"year":198,"html":199,"doi":11},19458201,1963,"Berry, L. G. (1963) Neptunite; unit cell and X-ray powder data. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  7 (4). 679-681 \u003Ca target='_blank' href='https:\u002F\u002Fwww.rruff.net\u002Fdoclib\u002Fcm\u002Fvol7\u002FCM7_679.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":201,"year":202,"html":203,"doi":204},623217,1966,"Cannilo, E., Mazzi, F., Rossi, G. (1966) The crystal structure of neptunite. \u003Ci>Acta Crystallographica\u003C\u002Fi>,  21 (2) 200-208 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1107\u002Fs0365110x66002627'>doi:10.1107\u002Fs0365110x66002627\u003C\u002Fa>","10.1107\u002Fs0365110x66002627",{"id":206,"year":207,"html":208,"doi":209},624855,1967,"Bancroft, G. M., Burns, R. G., Maddock, A. G. (1967) Oxidation state of iron in neptunite from Mössbauer spectroscopy. \u003Ci>Acta Crystallographica\u003C\u002Fi>,  22 (6) 934-935 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1107\u002Fs0365110x67001884'>doi:10.1107\u002Fs0365110x67001884\u003C\u002Fa>","10.1107\u002Fs0365110x67001884",{"id":211,"year":212,"html":213,"doi":11},525781,1972,"Laird, Jo, Albee, Arden L. (1972) Chemical composition and physical, optical, and structural properties of benitoite, neptunite, and joaquinite. \u003Ci>American Mineralogist\u003C\u002Fi>,  57 (1-2) 85-102 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM57\u002FAM57_85.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":215,"year":216,"html":217,"doi":218},7741748,1982,"Slansky, E., Glen, R. A. (1982) Neptunite from the Woodsreef Serpentinite, New South Wales: A new occurrence. \u003Ci>TMPM Tschermaks Mineralogische und Petrographische Mitteilungen\u003C\u002Fi>, 30 (4). 237-247 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf01087170'>doi:10.1007\u002Fbf01087170\u003C\u002Fa>","10.1007\u002Fbf01087170",{"id":220,"year":221,"html":222,"doi":223},151971,1991,"Kunz, Martin, Armbruster, Thomas, Lager, GeorgeA., Schultz, ArthurJ., Goyette, RickJ., Lottermoser, Werner, Amthauer, Georg (1991) Fe, Ti ordering and octahedral distortions in acentric neptunite: Temperature dependent X-ray and neutron structure refinements and Mössbauer spectroscopy. \u003Ci>Physics and Chemistry of Minerals\u003C\u002Fi>,  18 (3). 199-213 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf00234004'>doi:10.1007\u002Fbf00234004\u003C\u002Fa>","10.1007\u002Fbf00234004",{"id":225,"year":226,"html":227,"doi":11},529429,1993,"Jambor, L., Grew, Edward S. (1993) New Mineral Names. \u003Ci>American Mineralogist\u003C\u002Fi>,  78 (1-2) 233-238 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM78\u002FAM78_233.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":229,"year":230,"html":231,"doi":11},16966259,2001,"(2001) Neptunite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fneptunite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":233,"year":234,"html":235,"doi":11},16719964,2005,"Petersen, Ole V.; Johnsen, Ole (2005) \u003Ci>Mineral species first described from Greenland\u003C\u002Fi> - Special Publication No. 8. The Canadian Mineralogist. p.184",{"id":237,"year":238,"html":239,"doi":240},13088783,2022,"Richards, R. Peter, Žorž, Mirjan (2022) A New Study of Twinning in Neptunite. \u003Ci>Rocks & Minerals\u003C\u002Fi>, 97 (2) 165-172 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1080\u002F00357529.2022.2004516'>doi:10.1080\u002F00357529.2022.2004516\u003C\u002Fa>","10.1080\u002F00357529.2022.2004516",[242,249,259,268,276,284,291,299,306,314,323,333,339,346,356,363,368,374,380,387,393,399,407,414,421,428,434,440,445,451,457,465,475,483,491,499,505,513,520,527,536,542,550,557,564,571,578,584,590,596,603,609,614,620,626,631,636,642,648,654,660,667,673,679,685,690,697],{"id":243,"source_url":244,"license_code":245,"credit_html":246,"title":7,"description":11,"author":11,"original_width":247,"original_height":248},30338,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F130979","CC BY-SA 4.0","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby-sa\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F130979\" rel=\"noopener\">University of Tartu, Natural History Museum\u003C\u002Fa> via Europeana",1000,684,{"id":250,"source_url":251,"license_code":252,"credit_html":253,"title":254,"description":255,"author":256,"original_width":257,"original_height":258},65999,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10133135","CC BY-SA 3.0","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10133135\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Neptunite-48322.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3279.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>A very interesting, very aesthetic, cluster of curved bladed crystals with rough terminations on both ends. The blades have a deep cinnamon-brown color and excellent luster. This is not your average Neptunite, by any means. A very fine and unusual specimen. 3.6 x 1.2 x 1 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",799,345,{"id":260,"source_url":261,"license_code":245,"credit_html":262,"title":263,"description":264,"author":265,"original_width":266,"original_height":267},15343,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=9844135","Didier Descouens, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=9844135\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Neptunite.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa> \n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality : Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA\u003C\u002Fdd>\n\u003Cdd>Size : (Crystal size 2.5 cm)\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Didier Descouens",3056,4592,{"id":269,"source_url":270,"license_code":252,"credit_html":271,"title":272,"description":273,"author":256,"original_width":274,"original_height":275},70318,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10138758","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10138758\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Neptunite-114559.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDiablo_Range\" class=\"extiw\" title=\"en:Diablo Range\">Diablo Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3531.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 6.0 x 3.4 x 3.4 cm.\u003C\u002Fdd>\n\u003Cdd>This neptunite specimen features a single fine crystal dramatically jutting from the natrolite matrix. The crystal is pristine, and the faces are like black glass!\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",462,600,{"id":277,"source_url":278,"license_code":252,"credit_html":279,"title":280,"description":281,"author":256,"original_width":282,"original_height":283},66000,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10144309","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10144309\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Neptunite-140473.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDiablo_Range\" class=\"extiw\" title=\"en:Diablo Range\">Diablo Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3531.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 6.3 x 4.8 x 2.3 cm.\u003C\u002Fdd>\n\u003Cdd>A BEAUTIFUL, mounded plate aesthetically covered with mirror-finish, jet-black neptunite crystals to 3.0 cm on super-contrasting, snow-white natrolite matrix from the famous and now-closed Dallas Gem Mine. The large neptunite is doubly terminated and the only neptunite crystal damage is along the periphery.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",448,500,{"id":285,"source_url":286,"license_code":252,"credit_html":287,"title":288,"description":289,"author":256,"original_width":275,"original_height":290},66001,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10150306","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10150306\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Neptunite-172377.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDiablo_Range\" class=\"extiw\" title=\"en:Diablo Range\">Diablo Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3531.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 5.6 x 3.4 x 3.4 cm.\u003C\u002Fdd>\n\u003Cdd>The Dallas Gem Mine in California is known primarily for two things: benitoites and neptunites, both world-class for the species. This is a fine example of neptunite from the collection of Al McGuiness. The crystals, to 1.5 cm, have wonderful sharpness and luster, and are in superb condition. They look beautiful against the stark white natrolite.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",419,{"id":292,"source_url":293,"license_code":252,"credit_html":294,"title":295,"description":296,"author":256,"original_width":297,"original_height":298},66002,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10151206","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10151206\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Neptunite-176667.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDiablo_Range\" class=\"extiw\" title=\"en:Diablo Range\">Diablo Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3531.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 3.2 x 1.7 x 1.3 cm.\u003C\u002Fdd>\n\u003Cdd>A superb Neptunite thumbnail featuring a group of highly lustrous, sharp, deep red color, prismatic crystals on a contrasting layer of massive white Natrolite on matrix.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",342,576,{"id":300,"source_url":301,"license_code":252,"credit_html":302,"title":303,"description":304,"author":256,"original_width":305,"original_height":275},66004,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419431","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419431\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Neptunite-t5030a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDiablo_Range\" class=\"extiw\" title=\"en:Diablo Range\">Diablo Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3531.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 4.8 x 4.2 x 3.1 cm\n\u003Cdl>\u003Cdt>Neptunite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>Large, stark black neptunite crystal on matrix! 4.8 x 4.2 x 3.1 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",537,{"id":307,"source_url":308,"license_code":252,"credit_html":309,"title":310,"description":311,"author":256,"original_width":312,"original_height":313},66005,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447159","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447159\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Neptunite-denv08-24b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDiablo_Range\" class=\"extiw\" title=\"en:Diablo Range\">Diablo Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3531.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 3.4 x 2.4 x 1.8 cm\n\u003Cdl>\u003Cdt>Neptunite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A choice miniature with a sharp, robust, lustrous, textbook-crystal of neptunite, perched on just the right amount of contrasting matrix to make this crystal really leap out in a case. Black, but not ugly...this is the world's only world class locality for the species as far as I am concerned (not to discount the manganoan-red variety, which occurs in smaller xls). Now that the deposit is literally stripmined and gone, no more of this calibre can come from the ground as they did, sporadically, over many past years.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",597,800,{"id":315,"source_url":316,"license_code":245,"credit_html":317,"title":318,"description":319,"author":320,"original_width":321,"original_height":322},66009,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=157232275","J. Patrick Fischer, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=157232275\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","53390 Neptunit 1.jpg","\u003Ca href=\"https:\u002F\u002Fde.wikipedia.org\u002Fwiki\u002FNeptunit\" class=\"extiw\" title=\"de:Neptunit\">Neptunit\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Gewicht: 38,9 g\u003C\u002Fdd>\n\u003Cdd>Fundort: Dallas Gem Mine San Benito Co., Kalifornien, USA\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","J. Patrick Fischer",2595,1507,{"id":324,"source_url":325,"license_code":326,"credit_html":327,"title":328,"description":329,"author":330,"original_width":331,"original_height":332},12631,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=5543700","Public domain","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=5543700\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Joaquinite-(Ce), benitoite, neptunite, natrolite 2.jpg","joaquinite-(Ce), benitoite, neptunite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA","Géry PARENT",4288,2848,{"id":334,"source_url":335,"license_code":326,"credit_html":336,"title":337,"description":338,"author":330,"original_width":331,"original_height":332},3034,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=5543748","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=5543748\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Joaquinite-(Ce), benitoite, neptunite, natrolite 1.jpg","joaquinite-(Ce), benitoite, neptunite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA (Locality at mindat.org)",{"id":340,"source_url":341,"license_code":252,"credit_html":342,"title":343,"description":344,"author":256,"original_width":275,"original_height":345},35412,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10131330","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10131330\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite-Neptunite-41745.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBenitoite\" class=\"extiw\" title=\"en:Benitoite\">Benitoite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDiablo_Range\" class=\"extiw\" title=\"en:Diablo Range\">Diablo Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3531.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>An extraordinarily elegant plate of well-balanced benitoites perched on just the right amount of matrix, accented by stunning jetblack neptunites. Often, too much of the natrolite is removed in preparing the specimen and the benitoites are left sitting on dark matrix. This prep job, though, is so even its incredible, with uniform stark white backing to the sharp blue triangles. Note the 1.2 cm floating triangle, showing ALL faces and all 3 terminations, which is what really makes the piece significant - getting those floating crystals is NOT easy. I recently exchanged this from the Steve Smale collection. Steve is noted for his sharp eye for perfection and \"good horizons\", as well as his general good taste in aesthetic mineral specimens. This one fits! But, he had a few too many, we thought... 8.7 x 6 x 1.2 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",441,{"id":347,"source_url":348,"license_code":349,"credit_html":350,"title":351,"description":352,"author":353,"original_width":354,"original_height":355},2667,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500666","CC BY 2.0","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500666\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Blueschist with benitoite-neptunite-natrolite vein (Franciscan Complex, Jurassic-Cretaceous; Middle Miocene vein mineralization, 12 Ma; Dallas Gem Mine, California, USA) 9 (49143720718).jpg","\u003Cp>(public display, Leadville Mining Museum, Leadville, Colorado, USA)\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Bluish = benitoite\nWhite = natrolite\nBlack = neptunite\nHost rock = blueschist\n\u003C\u002Fp>\u003Cp>The bluish-colored crystals shown above are benitoite, a very rare barium titanium silicate mineral (BaTiSi3O9) known principally from San Benito County, California, USA.  Large, gem-quality crystals that have been cut, faceted, and polished have the “fire” of diamond (~same index of refraction), but have a lovely deep blue color (<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Benitoite-1.gif\">http:\u002F\u002Fwww.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Benitoite-1.gif\u003C\u002Fa>\" rel=\"noreferrer nofollow\">www.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Ben...<\u002Fa>).  Benitoite is a metamorphic mineral.  Its principal occurrence is in California, where polymineralic veins have intruded a blueschist body between serpentinites and greenstones of the Franciscan Formation.  The Franciscan Fm. is a widespread, heterolithic unit of Jurassic-Cretaceous age in the Coast Ranges of western California.  The vein mineralization age is late Middle Miocene (12 Ma).\n\u003C\u002Fp>\u003Cp>Four minerals are commonly found in these veins: benitoite (blue), neptunite (blackish - Na2KLi(Fe,Mn)2Ti2Si8O24), natrolite (white - Na2Al2Si3O10·2H2O), and joaquinite (orangish-brown - Ba2NaCe2FeTi2Si8O26(OH,F)·H2O).  The natrolite portion is acid-soluble.  Nicely crystalline specimens like those seen here are produced by acid etching the natrolite-dominated veins.  After acid treatment, the other minerals stand out in relief.\n\u003C\u002Fp>\u003Cp>Stratigraphy of blueschist host rock: Franciscan Complex, Jurassic-Cretaceous\n\u003C\u002Fp>\u003Cp>Age of benitoite-bearing vein mineralization: Middle Miocene, 12 Ma\n\u003C\u002Fp>\nLocality: Dallas Gem Mine (a.k.a. Benitoite Gem Mine), near Santa Rita peak, southeast of New Idria, far-southeastern San Benito County, California, USA (~36° 20’ 10” North latitude, ~120° 36’ 19” West longitude)","James St. John",3008,2000,{"id":357,"source_url":358,"license_code":252,"credit_html":359,"title":360,"description":361,"author":362,"original_width":331,"original_height":332},12634,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13585696","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13585696\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite, joaquinite-(Ce), neptunite, natrolite.jpg","benitoite,  joaquinite-(Ce), neptunite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA","Parent Géry",{"id":364,"source_url":365,"license_code":326,"credit_html":366,"title":367,"description":329,"author":330,"original_width":331,"original_height":332},15342,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=5543860","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=5543860\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Joaquinite-(Ce), benitoite, neptunite, natrolite 3.jpg",{"id":369,"source_url":370,"license_code":326,"credit_html":371,"title":372,"description":373,"author":330,"original_width":331,"original_height":332},17567,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11701644","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11701644\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Joaquinite, benitoite, neptunite, djurleite, natrolite.jpg","joaquinite-(Ce), benitoite, neptunite, djurleite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",{"id":375,"source_url":376,"license_code":252,"credit_html":377,"title":378,"description":379,"author":362,"original_width":331,"original_height":332},7293,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13583820","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13583820\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite, neptunite, joaquinite-(Ce), djurleite, natrolite.jpg","benitoite, neptunite, joaquinite-(Ce), djurleite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",{"id":381,"source_url":382,"license_code":252,"credit_html":383,"title":384,"description":385,"author":256,"original_width":275,"original_height":386},35414,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10144715","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10144715\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite-Neptunite-Natrolite-144991.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBenitoite\" class=\"extiw\" title=\"en:Benitoite\">Benitoite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNatrolite\" class=\"extiw\" title=\"en:Natrolite\">Natrolite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDiablo_Range\" class=\"extiw\" title=\"en:Diablo Range\">Diablo Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3531.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 10.3 x 6.6 x 3.0 cm.\u003C\u002Fdd>\n\u003Cdd>An AESTHETIC and EXCELLENT Dallas Gem Mine CABINET plate with partially gemmy, light indigo-blue benitoite crystals to 1.5 cm RICHLY sprinkled on natrollite-covered matrix. Scattered black neptunite crystals to 7 mm are a nice compliment. This is FINE, older material, HARD to obtain now with the closing of the mine.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",424,{"id":388,"source_url":389,"license_code":252,"credit_html":390,"title":391,"description":392,"author":256,"original_width":386,"original_height":275},35415,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10146235","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10146235\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite-Neptunite-153374.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBenitoite\" class=\"extiw\" title=\"en:Benitoite\">Benitoite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDiablo_Range\" class=\"extiw\" title=\"en:Diablo Range\">Diablo Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3531.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 6.3 x 4.6 x 2.0 cm.\u003C\u002Fdd>\n\u003Cdd>A 1.2 cm high, partially gemmy, free-standing benitoite crystal dominates this excellent, richly covered benitoite specimen from the famous and now-closed Dallas Gem Mine. The largest benitoite is 1.6 cm and a couple of neptunites are a nice accent. This is classic, showy, old-time, highly representative material that is not diminished by the minor edge wear on most of the major benitoites. Despite this minor edge wear, it is overall a visually impressive piece with robust color and contrast, and lots more 3-dimensionality than usual. Ex. John Ydren Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",{"id":394,"source_url":395,"license_code":252,"credit_html":396,"title":397,"description":398,"author":362,"original_width":331,"original_height":332},7295,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=21137246","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=21137246\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite, neptunite, joaquinite-(Ce) djurleite, natrolite.jpg","benitoite, neptunite, djurleite, joaquinite-(Ce), natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",{"id":400,"source_url":401,"license_code":252,"credit_html":402,"title":403,"description":404,"author":256,"original_width":405,"original_height":406},35416,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10150010","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10150010\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite-Neptunite-171806.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBenitoite\" class=\"extiw\" title=\"en:Benitoite\">Benitoite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDiablo_Range\" class=\"extiw\" title=\"en:Diablo Range\">Diablo Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3531.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 2.1 x 1.3 x 1.0 cm.\u003C\u002Fdd>\n\u003Cdd>A sharp, gemmy, 1.3 cm, indigo-blue benitoite crystal beautifully attached to a lustrous, black neptunite crystal from the famous and now-closed Dallas Gem Mine. The bit of natrolite is a nice accent. The benitoite has textbook crystal form and sharp beveled edges. A CLASSIC Dallas Gem Mine thumbnail combo.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",400,372,{"id":408,"source_url":409,"license_code":252,"credit_html":410,"title":411,"description":412,"author":256,"original_width":275,"original_height":413},66003,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10154604","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10154604\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Neptunite-Natrolite-187707.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNatrolite\" class=\"extiw\" title=\"en:Natrolite\">Natrolite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDiablo_Range\" class=\"extiw\" title=\"en:Diablo Range\">Diablo Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3531.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 6.3 x 5.7 x 2.4 cm.\u003C\u002Fdd>\n\u003Cdd>Lustrous, jet-black neptunite crystals are richly and aesthetically strewn on contrasting snow-white natrolite and matrix on this fine specimen from the Dallas Gem Mine. The neptunites reach 1.6 cm.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",577,{"id":415,"source_url":416,"license_code":252,"credit_html":417,"title":418,"description":419,"author":256,"original_width":405,"original_height":420},35417,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10441726","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10441726\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite-Neptunite-mun05-53b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBenitoite\" class=\"extiw\" title=\"en:Benitoite\">Benitoite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Gem Mine, San Benito County, California\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 4.1 x 1.8 x 1.7 cm\n\u003Cdl>\u003Cdt>Benitoite on Neptunite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This is a most unusual specimen featuring a benny perched up on a neptunite crystal, as if it were hanging on and spinning around it. The neptunite is terminated, if cruedly and etched. The benitoite is also temrinated fully, though the growth is asymmetric in parts. It is pristine and complete save for a tiny ding that does not detract. Especially gazing at it in a case, the eye is struck by the casual randomness and symmetry of the associaiton - you just don't see bennies like this around. This is a thick benitoite too, not slender at all. The two best crystal terminations on the benitoite triangle have nice, thick gem rough areas to them. I would estimate there is a carat stone in the frontal termination, and a slightly smaller one in the termination pointing up and away as shown. Frank Knechtel was a soybean famer in San Diego who sold his land for suburban development and amassed a huge and fine collection. Kevin is a friend of mine, locally, who bought this from me perhaps 6-7 years ago and has now traded it back. I prefer to sell it as a specimen first, but with the value of cut benitoite rising now that the mine is stripped bare, I will simply have it cut eventually if it does not sell first. 4.1 x 1.8 x 1.7 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",322,{"id":422,"source_url":423,"license_code":252,"credit_html":424,"title":425,"description":426,"author":256,"original_width":427,"original_height":275},35420,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10464118","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10464118\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite-Neptunite-ss15a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBenitoite\" class=\"extiw\" title=\"en:Benitoite\">Benitoite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Gem Mine, San Benito Co., California\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 5.7 x 3.3 x 2 cm\n\u003Cdl>\u003Cdt>Benitoite, Neptunite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>RAZOR SHARP XLS!!! Perfectly balanced, this aesthetic combination specimen of lustrous, blue benitoite crystals and a black, crystal of superbly lustered, neptunite, represents the very best of this unique deposit - now, forever closed. The largest benitoite is 1.5 cm in length and the neptunite is 1.75 cm in length. Oh, by the way, these crystals are perched on white natrolite for stunning contrast. The color of the blue benitoite is top tier, and the lustre of both species is very high. In person, you can see why Steve bought this and stored it - it is extremely fine, just that extra bit sharper and more beautiful, than most. It is a top tier miniature for him and for anybody.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",536,{"id":429,"source_url":430,"license_code":326,"credit_html":431,"title":432,"description":433,"author":362,"original_width":331,"original_height":332},35422,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11701519","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11701519\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite, neptunite, joaquinite-(Ce), natrolite, serpentine.jpg","benitoite, neptunite, joaquinite-(Ce), natrolite, serpentine : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",{"id":435,"source_url":436,"license_code":252,"credit_html":437,"title":438,"description":439,"author":362,"original_width":331,"original_height":332},35425,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=21137697","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=21137697\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Crossite, bénitoïte, neptunite, natrolite 1.jpeg","djurleite, benitoïte, neptunite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA (Locality at mindat.org)",{"id":441,"source_url":442,"license_code":252,"credit_html":443,"title":444,"description":439,"author":362,"original_width":331,"original_height":332},35426,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=21137699","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=21137699\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Crossite, bénitoïte, neptunite, natrolite.jpeg",{"id":446,"source_url":447,"license_code":252,"credit_html":448,"title":449,"description":450,"author":362,"original_width":331,"original_height":332},61664,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22522069","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22522069\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Joaquinite-(Ce), neptunite, natrolite, serpentine.jpeg","crystals of joaquinite-(Ce), crystals of neptunite, natrolite, serpentine : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",{"id":452,"source_url":453,"license_code":252,"credit_html":454,"title":455,"description":456,"author":362,"original_width":331,"original_height":332},35427,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22584470","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22584470\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bénitoïte, neptunite, joaquinite-(Ce), natrolite, serpentine 2.JPG","benitoïte, neptunite, joaquinite-(Ce), natrolite, serpentine : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA (Locality at mindat.org",{"id":458,"source_url":459,"license_code":252,"credit_html":460,"title":461,"description":462,"author":362,"original_width":463,"original_height":464},61665,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32968098","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32968098\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Joaquinite-Ce, neptunite, natrolite 300-3-FS.jpg","crystals of joaquinite-(Ce), crystals of neptunite, crystals of natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",4341,3390,{"id":466,"source_url":467,"license_code":468,"credit_html":469,"title":470,"description":471,"author":472,"original_width":473,"original_height":474},66007,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80074939","CC BY 4.0","Dguendel, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80074939\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Freiberg, Terra mineralia, Neptunit auf Natrolith.JPG","Freiberg, Terra mineralia, neptunite on natrolite, location: Park County, California, USA","Dguendel",3894,3050,{"id":476,"source_url":477,"license_code":349,"credit_html":478,"title":479,"description":480,"author":353,"original_width":481,"original_height":482},2663,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=83657474","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=83657474\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Blueschist with benitoite-neptunite-joaquinite-natrolite vein (Franciscan Complex, Jurassic-Cretaceous; Middle Miocene vein mineralization, 12 Ma; Dallas Gem Mine, California, USA) 2 (25400412690).jpg","\u003Cp>Benitoite crystals from California, USA. (public display, Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, USA)\n\u003C\u002Fp>\u003Cp>Blue = benitoite\nWhite = natrolite\nSmall black sticks = neptunite\n\u003C\u002Fp>\u003Cp>The bluish-colored crystals shown above are benitoite, a very rare barium titanium silicate mineral (BaTiSi3O9) known principally from San Benito County, California, USA.  Large, gem-quality crystals that have been cut, faceted, and polished have the “fire” of diamond (~same index of refraction), but have a lovely deep blue color (<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Benitoite-1.gif\">http:\u002F\u002Fwww.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Benitoite-1.gif\u003C\u002Fa>\" rel=\"noreferrer nofollow\">www.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Ben...<\u002Fa>).  Benitoite is a metamorphic mineral.  Its principal occurrence is in California, where polymineralic veins have intruded a blueschist body between serpentinites and greenstones of the Franciscan Formation.  The Franciscan Fm. is a widespread, heterolithic unit of Jurassic-Cretaceous age in the Coast Ranges of western California.  The vein mineralization age is late Middle Miocene (12 m.y.).\n\u003C\u002Fp>\u003Cp>Four minerals are commonly found in these veins: benitoite (blue), neptunite (blackish - Na2KLi(Fe,Mn)2Ti2Si8O24), natrolite (white - Na2Al2Si3O10·2H2O), and joaquinite (orangish-brown - Ba2NaCe2FeTi2Si8O26(OH,F)·H2O).  The natrolite portion is acid-soluble.  Nicely crystalline rock faces like the one shown above are produced by acid etching the natrolite-dominated veins.  After acid treatment, the other minerals stand out in relief.\n\u003C\u002Fp>\u003Cp>Stratigraphy of blueschist host rock: Franciscan Complex, Jurassic-Cretaceous\n\u003C\u002Fp>\u003Cp>Age of benitoite-bearing vein mineralization: Middle Miocene, 12 Ma\n\u003C\u002Fp>\nLocality: Dallas Gem Mine (a.k.a. Benitoite Gem Mine), near Santa Rita peak, southeast of New Idria, far-southeastern San Benito County, California, USA (~36° 20’ 10” North latitude, ~120° 36’ 19” West longitude)",4100,2404,{"id":484,"source_url":485,"license_code":349,"credit_html":486,"title":487,"description":488,"author":353,"original_width":489,"original_height":490},2664,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=83657773","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=83657773\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Blueschist with benitoite-neptunite-natrolite vein (Franciscan Complex, Jurassic-Cretaceous; Middle Miocene vein mineralization, 12 Ma; Dallas Gem Mine, California, USA) 2 (32832839407).jpg","\u003Cp>Benitoite crystals from California, USA.\n\u003C\u002Fp>\u003Cp>Blue = benitoite\nWhite = natrolite\nBlack sticks = neptunite\nHost rock = blueschist\n\u003C\u002Fp>\u003Cp>The bluish-colored crystals shown above are benitoite, a very rare barium titanium silicate mineral (BaTiSi3O9) known principally from San Benito County, California, USA.  Large, gem-quality crystals that have been cut, faceted, and polished have the “fire” of diamond (~same index of refraction), but have a lovely deep blue color (<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Benitoite-1.gif\">http:\u002F\u002Fwww.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Benitoite-1.gif\u003C\u002Fa>\" rel=\"noreferrer nofollow\">www.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Ben...<\u002Fa>).  Benitoite is a metamorphic mineral.  Its principal occurrence is in California, where polymineralic veins have intruded a blueschist body between serpentinites and greenstones of the Franciscan Formation.  The Franciscan Fm. is a widespread, heterolithic unit of Jurassic-Cretaceous age in the Coast Ranges of western California.  The vein mineralization age is late Middle Miocene (12 Ma).\n\u003C\u002Fp>\u003Cp>Four minerals are commonly found in these veins: benitoite (blue), neptunite (blackish - Na2KLi(Fe,Mn)2Ti2Si8O24), natrolite (white - Na2Al2Si3O10·2H2O), and joaquinite (orangish-brown - Ba2NaCe2FeTi2Si8O26(OH,F)·H2O).  The natrolite portion is acid-soluble.  Nicely crystalline rock faces like the one shown above are produced by acid etching the natrolite-dominated veins.  After acid treatment, the other minerals stand out in relief.\n\u003C\u002Fp>\u003Cp>Stratigraphy of blueschist host rock: Franciscan Complex, Jurassic-Cretaceous\n\u003C\u002Fp>\u003Cp>Age of benitoite-bearing vein mineralization: Middle Miocene, 12 Ma\n\u003C\u002Fp>\nLocality: Dallas Gem Mine (a.k.a. Benitoite Gem Mine), near Santa Rita peak, southeast of New Idria, far-southeastern San Benito County, California, USA (~36° 20’ 10” North latitude, ~120° 36’ 19” West longitude)",2482,3278,{"id":492,"source_url":493,"license_code":349,"credit_html":494,"title":495,"description":496,"author":353,"original_width":497,"original_height":498},2665,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500656","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500656\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Blueschist with benitoite-neptunite-natrolite vein (Franciscan Complex, Jurassic-Cretaceous; Middle Miocene vein mineralization, 12 Ma; Dallas Gem Mine, California, USA) 4 (49144209306).jpg","\u003Cp>(public display, Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, USA)\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Blue = benitoite\nWhite = natrolite\nBlack = neptunite\nHost rock = blueschist\n\u003C\u002Fp>\u003Cp>The bluish-colored crystals shown above are benitoite, a very rare barium titanium silicate mineral (BaTiSi3O9) known principally from San Benito County, California, USA.  Large, gem-quality crystals that have been cut, faceted, and polished have the “fire” of diamond (~same index of refraction), but have a lovely deep blue color (<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Benitoite-1.gif\">http:\u002F\u002Fwww.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Benitoite-1.gif\u003C\u002Fa>\" rel=\"noreferrer nofollow\">www.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Ben...<\u002Fa>).  Benitoite is a metamorphic mineral.  Its principal occurrence is in California, where polymineralic veins have intruded a blueschist body between serpentinites and greenstones of the Franciscan Formation.  The Franciscan Fm. is a widespread, heterolithic unit of Jurassic-Cretaceous age in the Coast Ranges of western California.  The vein mineralization age is late Middle Miocene (12 Ma).\n\u003C\u002Fp>\u003Cp>Four minerals are commonly found in these veins: benitoite (blue), neptunite (blackish - Na2KLi(Fe,Mn)2Ti2Si8O24), natrolite (white - Na2Al2Si3O10·2H2O), and joaquinite (orangish-brown - Ba2NaCe2FeTi2Si8O26(OH,F)·H2O).  The natrolite portion is acid-soluble.  Nicely crystalline specimens like those seen here are produced by acid etching the natrolite-dominated veins.  After acid treatment, the other minerals stand out in relief.\n\u003C\u002Fp>\u003Cp>Stratigraphy of blueschist host rock: Franciscan Complex, Jurassic-Cretaceous\n\u003C\u002Fp>\u003Cp>Age of benitoite-bearing vein mineralization: Middle Miocene, 12 Ma\n\u003C\u002Fp>\nLocality: Dallas Gem Mine (a.k.a. Benitoite Gem Mine), near Santa Rita peak, southeast of New Idria, far-southeastern San Benito County, California, USA (~36° 20’ 10” North latitude, ~120° 36’ 19” West longitude)",3466,2284,{"id":500,"source_url":501,"license_code":349,"credit_html":502,"title":503,"description":504,"author":353,"original_width":482,"original_height":355},2666,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500664","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500664\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Blueschist with benitoite-neptunite-natrolite vein (Franciscan Complex, Jurassic-Cretaceous; Middle Miocene vein mineralization, 12 Ma; Dallas Gem Mine, California, USA) 8 (49143717068).jpg","\u003Cp>Blue = benitoite\nWhite = natrolite\nBlack = neptunite\nHost rock = blueschist\n\u003C\u002Fp>\u003Cp>The bluish-colored crystals shown above are benitoite, a very rare barium titanium silicate mineral (BaTiSi3O9) known principally from San Benito County, California, USA.  Large, gem-quality crystals that have been cut, faceted, and polished have the “fire” of diamond (~same index of refraction), but have a lovely deep blue color (<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"https:\u002F\u002Fwww.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Benitoite-1.gif\">https:\u002F\u002Fwww.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Benitoite-1.gif\u003C\u002Fa>\" rel=\"noreferrer nofollow\">www.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Ben...<\u002Fa>).  Benitoite is a metamorphic mineral.  Its principal occurrence is in California, where polymineralic veins have intruded a blueschist body between serpentinites and greenstones of the Franciscan Formation.  The Franciscan Fm. is a widespread, heterolithic unit of Jurassic-Cretaceous age in the Coast Ranges of western California.  The vein mineralization age is late Middle Miocene (12 Ma).\n\u003C\u002Fp>\u003Cp>Four minerals are commonly found in these veins: benitoite (blue), neptunite (blackish - Na2KLi(Fe,Mn)2Ti2Si8O24), natrolite (white - Na2Al2Si3O10·2H2O), and joaquinite (orangish-brown - Ba2NaCe2FeTi2Si8O26(OH,F)·H2O).  The natrolite portion is acid-soluble.  Nicely crystalline specimens like those seen here are produced by acid etching the natrolite-dominated veins.  After acid treatment, the other minerals stand out in relief.\n\u003C\u002Fp>\u003Cp>Stratigraphy of blueschist host rock: Franciscan Complex, Jurassic-Cretaceous\n\u003C\u002Fp>\u003Cp>Age of benitoite-bearing vein mineralization: Middle Miocene, 12 Ma\n\u003C\u002Fp>\nLocality: Dallas Gem Mine (a.k.a. Benitoite Gem Mine), near Santa Rita peak, southeast of New Idria, far-southeastern San Benito County, California, USA (~36° 20’ 10” North latitude, ~120° 36’ 19” West longitude)",{"id":506,"source_url":507,"license_code":349,"credit_html":508,"title":509,"description":510,"author":353,"original_width":511,"original_height":512},2668,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500668","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500668\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Blueschist with benitoite-neptunite-natrolite vein (Franciscan Complex, Jurassic-Cretaceous; Middle Miocene vein mineralization, 12 Ma; Dallas Gem Mine, California, USA) 12 (49144418917).jpg","\u003Cp>(public display, Field Museum of Natural History, Chicago, Illinois, USA)\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Blue = benitoite\nWhite = natrolite\nBlack = neptunite\nHost rock = blueschist\n\u003C\u002Fp>\u003Cp>The bluish-colored crystals shown above are benitoite, a very rare barium titanium silicate mineral (BaTiSi3O9) known principally from San Benito County, California, USA.  Large, gem-quality crystals that have been cut, faceted, and polished have the “fire” of diamond (~same index of refraction), but have a lovely deep blue color (<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Benitoite-1.gif\">http:\u002F\u002Fwww.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Benitoite-1.gif\u003C\u002Fa>\" rel=\"noreferrer nofollow\">www.jewelryexpert.com\u002Fcatalog\u002Fgraphics\u002FFancy-Trillium-Ben...<\u002Fa>).  Benitoite is a metamorphic mineral.  Its principal occurrence is in California, where polymineralic veins have intruded a blueschist body between serpentinites and greenstones of the Franciscan Formation.  The Franciscan Fm. is a widespread, heterolithic unit of Jurassic-Cretaceous age in the Coast Ranges of western California.  The vein mineralization age is late Middle Miocene (12 Ma).\n\u003C\u002Fp>\u003Cp>Four minerals are commonly found in these veins: benitoite (blue), neptunite (blackish - Na2KLi(Fe,Mn)2Ti2Si8O24), natrolite (white - Na2Al2Si3O10·2H2O), and joaquinite (orangish-brown - Ba2NaCe2FeTi2Si8O26(OH,F)·H2O).  The natrolite portion is acid-soluble.  Nicely crystalline specimens like those seen here are produced by acid etching the natrolite-dominated veins.  After acid treatment, the other minerals stand out in relief.\n\u003C\u002Fp>\u003Cp>Stratigraphy of blueschist host rock: Franciscan Complex, Jurassic-Cretaceous\n\u003C\u002Fp>\u003Cp>Age of benitoite-bearing vein mineralization: Middle Miocene, 12 Ma\n\u003C\u002Fp>\nLocality: Dallas Gem Mine (a.k.a. Benitoite Gem Mine), near Santa Rita peak, southeast of New Idria, far-southeastern San Benito County, California, USA (~36° 20’ 10” North latitude, ~120° 36’ 19” West longitude)",1876,2373,{"id":514,"source_url":515,"license_code":349,"credit_html":516,"title":517,"description":510,"author":353,"original_width":518,"original_height":519},2669,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500669","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500669\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Blueschist with benitoite-neptunite-natrolite vein (Franciscan Complex, Jurassic-Cretaceous; Middle Miocene vein mineralization, 12 Ma; Dallas Gem Mine, California, USA) 11 (49144217586).jpg",2039,2472,{"id":521,"source_url":522,"license_code":349,"credit_html":523,"title":524,"description":510,"author":353,"original_width":525,"original_height":526},2670,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500670","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500670\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Blueschist with benitoite-neptunite-natrolite vein (Franciscan Complex, Jurassic-Cretaceous; Middle Miocene vein mineralization, 12 Ma; Dallas Gem Mine, California, USA) 13 (49143721538).jpg",1880,2356,{"id":528,"source_url":529,"license_code":326,"credit_html":530,"title":531,"description":532,"author":533,"original_width":534,"original_height":535},3039,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10592532","Stickpen, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10592532\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite-neptunite-natrolite.jpg","Benitoite (blue) & neptunite (black) in natrolite (white) from San Benito County, California, USA. Photographed at the San Diego Natural History Museum, California, USA.","Stickpen",2279,2659,{"id":537,"source_url":538,"license_code":252,"credit_html":539,"title":540,"description":541,"author":330,"original_width":331,"original_height":332},6488,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=19987652","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=19987652\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Crossite, bénitoïte, neptunite, joaquinite-(Ce), natrolite, serpentine.JPG","crossite, djurleite, benitoite, neptunite, joaquinite-(Ce), natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA (Locality at mindat.org)",{"id":543,"source_url":544,"license_code":245,"credit_html":545,"title":546,"description":547,"author":330,"original_width":548,"original_height":549},6490,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41291427","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41291427\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Crossite, neptunite, bénitoïte, natrolite 1100. FS2015.jpg","crossite, neptunite, benitoïte, natrolite : California State Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",1984,1622,{"id":551,"source_url":552,"license_code":245,"credit_html":553,"title":554,"description":547,"author":330,"original_width":555,"original_height":556},6491,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41291428","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41291428\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Crossite, neptunite, bénitoïte, natrolite 1100.FS2015.jpg",1975,1317,{"id":558,"source_url":559,"license_code":245,"credit_html":560,"title":561,"description":547,"author":330,"original_width":562,"original_height":563},6492,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41291430","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41291430\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Crossite, neptunite, bénitoïte, natrolite 7100.FS2015.jpg",1994,1329,{"id":565,"source_url":566,"license_code":245,"credit_html":567,"title":568,"description":547,"author":330,"original_width":569,"original_height":570},6493,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41291431","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41291431\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Crossite, neptunite, bénitoïte, natrolite FS2015.jpg",1995,1439,{"id":572,"source_url":573,"license_code":245,"credit_html":574,"title":575,"description":547,"author":330,"original_width":576,"original_height":577},6494,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41291434","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41291434\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Crossite, neptunite, bénitoïte, natrolite FS2015 1.jpg",1981,1765,{"id":579,"source_url":580,"license_code":252,"credit_html":581,"title":582,"description":583,"author":362,"original_width":331,"original_height":332},7292,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13344302","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13344302\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite, neptunite, joaquinite-(Ce), djurleite, natrolite, serpentine.jpg","benitoite, neptunite, joaquinite-(Ce), djurleite, natrolite, serpentine : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA - benitoïte : 15,5 mm, neptunite : 43 mm, joaquinite-(Ce) : 2 mm, djurleite : 4 mm",{"id":585,"source_url":586,"license_code":252,"credit_html":587,"title":588,"description":589,"author":362,"original_width":331,"original_height":332},7294,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=17017394","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=17017394\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite, neptunite, djurleite, natrolite.jpg","benitoite, neptunite, djurleite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",{"id":591,"source_url":592,"license_code":326,"credit_html":593,"title":594,"description":595,"author":362,"original_width":331,"original_height":332},17428,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11722983","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11722983\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Neptunite sur natrolite et serpentine (USA).jpg","Cristaux de neptunite, dont la couleur est rouge-foncée et non noire, sur natrolite et serpentine",{"id":597,"source_url":598,"license_code":326,"credit_html":599,"title":600,"description":601,"author":330,"original_width":602,"original_height":332},17429,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11723098","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11723098\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Neptunite, benitoite, natrolite.jpg","neptunite, benitoite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",4187,{"id":604,"source_url":605,"license_code":326,"credit_html":606,"title":607,"description":608,"author":11,"original_width":331,"original_height":332},35411,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=5299918","Unknown author, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=5299918\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bénitoïte, neptunite, joaquinite-(Ce), natrolite 2 (USA).jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBenitoite\" class=\"extiw\" title=\"en:Benitoite\">Benitoite\u003C\u002Fa> (blue), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FJoaquinite-(Ce)\" class=\"extiw\" title=\"en:Joaquinite-(Ce)\">Joaquinite\u003C\u002Fa> (brown) and \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa> (dark red) on \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNatrolite\" class=\"extiw\" title=\"en:Natrolite\">Natrolite\u003C\u002Fa> (white) : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA (Locality at mindat.org)",{"id":610,"source_url":611,"license_code":326,"credit_html":612,"title":613,"description":456,"author":362,"original_width":331,"original_height":332},35423,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11701581","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11701581\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bénitoïte, neptunite, joaquinite-(Ce) sur natrolite et serpentine (USA) 2.jpg",{"id":615,"source_url":616,"license_code":252,"credit_html":617,"title":618,"description":619,"author":330,"original_width":331,"original_height":332},35424,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=17448706","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=17448706\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Joaquinite-(Ce), bénitoïte, neptunite, natrolite, serpentine (Gem Mine San-Benito Californie - USA) 1.JPG","joaquinite-(Ce), benitoite, neptunite, djurleite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA (Locality at mindat.org)",{"id":621,"source_url":622,"license_code":326,"credit_html":623,"title":624,"description":625,"author":330,"original_width":331,"original_height":332},52554,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11723297","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11723297\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Neptunite, bénitoïte, joaquinite-(Ce) sur natrolite et serpentine (USA) 2.jpg","benitoite, neptunite, joaquinite-(Ce), djurleite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA - benitoite : 15,5 mm, neptunite : 43 mm",{"id":627,"source_url":628,"license_code":252,"credit_html":629,"title":630,"description":379,"author":362,"original_width":331,"original_height":332},52555,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13582498","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13582498\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bénitoïte, neptunite, joaquinite-(Ce) (USA) 4.jpg",{"id":632,"source_url":633,"license_code":252,"credit_html":634,"title":635,"description":379,"author":362,"original_width":331,"original_height":332},52556,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13585364","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13585364\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bénitoïte, neptunite, joaquinite-(Ce) sur natrolite (San-Benito Mine Californie - USA).jpg",{"id":637,"source_url":638,"license_code":252,"credit_html":639,"title":640,"description":641,"author":330,"original_width":331,"original_height":332},52557,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=17448678","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=17448678\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Joaquinite-(Ce), benitoite, neptunite, natrolite.jpg","joaquinite-(Ce), benitoite, neptunite, djurleite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USAj",{"id":643,"source_url":644,"license_code":252,"credit_html":645,"title":646,"description":647,"author":362,"original_width":331,"original_height":332},52558,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=19987714","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=19987714\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Crossite, bénitoïte, neptunite, joaquinite-(Ce), natrolite, serpentine 1.JPG","djurleite, benitoïte, neptunite, joaquinite-(Ce), natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA (Locality at mindat.org",{"id":649,"source_url":650,"license_code":252,"credit_html":651,"title":652,"description":653,"author":362,"original_width":331,"original_height":332},52559,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=21137698","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=21137698\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Crossite, bénitoïte, neptunite, joaquinite-(Ce), natrolite.jpeg","djurleite, benitoïte, neptunite, joaquinite-(Ce), natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA (Locality at mindat.org)",{"id":655,"source_url":656,"license_code":326,"credit_html":657,"title":658,"description":659,"author":362,"original_width":331,"original_height":332},61656,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=5311509","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=5311509\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bénitoïte, neptunite, joaquinite-(Ce), natrolite 1 (USA).jpg","benitoite, neptunite, joaquinite-(Ce), natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",{"id":661,"source_url":662,"license_code":252,"credit_html":663,"title":664,"description":665,"author":256,"original_width":275,"original_height":666},61657,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10124327","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10124327\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Joaquinite-(Ce)-Neptunite-34327.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FJoaquinite-(Ce)\" class=\"extiw\" title=\"en:Joaquinite-(Ce)\">Joaquinite-(Ce)\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDiablo_Range\" class=\"extiw\" title=\"en:Diablo Range\">Diablo Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Benito_County,_California\" class=\"extiw\" title=\"en:San Benito County, California\">San Benito County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalifornia\" class=\"extiw\" title=\"en:California\">California\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3531.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>For those who know what they are looking at, this piece should be appreciated...it is thought to host one of the largest known crystals of Joaquinite , to a hair over 3 mm in size! That sharp crystal sits front and center on the matrix for nice display. It is, really, an amazing piece (if admittedly esoteric) and I do not think such a specimen can come again the way the recent mining has gone. 8.2 x 4.3 x 3.3 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",404,{"id":668,"source_url":669,"license_code":252,"credit_html":670,"title":671,"description":672,"author":362,"original_width":331,"original_height":332},61659,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13581765","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13581765\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Joaquinite-(Ce), neptunite (USA).jpg","crystals of joaquinite-(Ce), crystals of neptunite, natrolite, crossite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",{"id":674,"source_url":675,"license_code":252,"credit_html":676,"title":677,"description":678,"author":362,"original_width":331,"original_height":332},61660,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13586043","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13586043\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Benitoite, neptunite, joaquinite-(Ce), natrolite.jpg","benitoite, joaquinite-(Ce), neptunite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",{"id":680,"source_url":681,"license_code":252,"credit_html":682,"title":683,"description":684,"author":362,"original_width":331,"original_height":332},61662,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=16134211","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=16134211\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Joaquinite-(Ce), neptunite et natrolite (USA).JPG","crystals of joaquinite-(Ce), crystals of neptunite, natrolite : Dallas Gem Mine (Benitoite Mine ; Benitoite Gem Mine ; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA",{"id":686,"source_url":687,"license_code":252,"credit_html":688,"title":689,"description":684,"author":362,"original_width":331,"original_height":332},61663,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=16134260","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=16134260\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Joaquinite-(Ce), neptunite et natrolite (USA) 1.JPG",{"id":691,"source_url":692,"license_code":252,"credit_html":693,"title":694,"description":695,"author":256,"original_width":405,"original_height":696},64203,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10463236","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10463236\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Leifite-Neptunite-Serandite-sf41b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FLeifite\" class=\"extiw\" title=\"en:Leifite\">Leifite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNeptunite\" class=\"extiw\" title=\"en:Neptunite\">Neptunite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSerandite\" class=\"extiw\" title=\"en:Serandite\">Serandite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Mt. St. Hilaire, Quebec, Canada\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 5.6 x 3.6 x 3.1 cm\n\u003Cdl>\u003Cdt>Leifite, Serandite, Mangan-Neptunite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This remarkable, colorful, dramatic combination specimen was collected by Gilles Haineult and also a surprise to me at the show, in that I had thought all good ones from this pocket long sold. Moreover, I have never had one with such large leifite clusters ON contrasting serandite, nor have i seen such a fine specimen for sale with any dealership. The cluster shown in the closeup is 2.5 cm across! (that view is actually of the back left side of the specimen as shown in the whole photo). I think most people could agree that this particular pocket produced best of species for the mineral in terms of crystal size and aggregate size, and so to have a matrix example of such quality is rather significant.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",300,{"id":698,"source_url":699,"license_code":252,"credit_html":700,"title":701,"description":695,"author":256,"original_width":405,"original_height":702},64204,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10463238","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10463238\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Leifite-Neptunite-Serandite-sf41a.jpg",291,[704,710],{"id":705,"url":706,"label":707,"formula":708,"spacegroup":709,"year":221},9882,"\u002Fcif\u002F9882.cif","Kunz 1991","Na2 K Li Ti2 Fe2 Si8 O24","C 1 c 1",{"id":711,"url":712,"label":713,"formula":714,"spacegroup":715,"year":202},9886,"\u002Fcif\u002F9886.cif","Cannillo 1966","(Fe2 Ti2) Na2 K Li Si8 O24","C 1 2\u002Fc 1",[717,718,719,720],"Carlosit","Carlosita","Carlosite","Ferroneptunite",[722,726,730,734,737,740,744,748,751,754,759,763,766,770,774,778,782],{"lang":723,"names":724},"ast",[725],"Neptunita",{"lang":727,"names":728},"ca",[729],"neptunita",{"lang":731,"names":732},"de",[733],"Neptunit",{"lang":735,"names":736},"es",[725],{"lang":738,"names":739},"eu",[725],{"lang":741,"names":742},"fa",[743],"نپتونیت",{"lang":745,"names":746},"fi",[747],"Neptuniitti",{"lang":749,"names":750},"fr",[719,720,7],{"lang":752,"names":753},"it",[7],{"lang":755,"names":756},"ja",[757,758],"ネプチュナイト","海王石",{"lang":760,"names":761},"nl",[762],"neptuniet",{"lang":764,"names":765},"pl",[733],{"lang":767,"names":768},"ru",[769],"Нептунит",{"lang":771,"names":772},"ta",[773],"நெப்டூனைட்டு",{"lang":775,"names":776},"th",[777],"เนปทูไนต์",{"lang":779,"names":780},"uk",[781],"Нептуніт",{"lang":783,"names":784},"zh",[785],"柱星葉石","Q423433",{"history":11,"applications":11}]