[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:642":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":11,"polytypeof":11,"groupid":11,"weighting":12,"nolocadd":13,"blacklisted":13,"mindat_formula":14,"mindat_formula_note":11,"ima_formula":15,"elements":16,"sigelements":21,"key_elements":22,"impurities":23,"cim":24,"ima_status":25,"ima_notes":11,"ima_history":11,"approval_year":11,"publication_year":28,"discovery_year":29,"strunz10ed1":30,"strunz10ed2":31,"strunz10ed3":32,"strunz10ed4":33,"dana8ed1":34,"dana8ed2":35,"dana8ed3":35,"dana8ed4":35,"csystem":36,"cclass":37,"spacegroup":38,"spacegroupset":39,"a":40,"b":41,"c":42,"alpha":39,"beta":39,"gamma":39,"aerror":43,"berror":44,"cerror":45,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":11,"z":43,"csmetamict":13,"commentcrystal":11,"twinning":46,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":47,"tlform":11,"hmin":37,"hmax":48,"hardtype":11,"vhnmin":39,"vhnmax":39,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":49,"dmeas2":50,"dcalc":51,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":52,"lustretype":53,"commentluster":54,"diapheny":55,"streak":56,"colour":57,"commentcolor":11,"colors":58,"streak_colors":62,"luminescence":11,"uv":11,"cleavage":63,"cleavagetype":64,"fracturetype":11,"tenacity":11,"commentbreak":11,"opticaltype":65,"opticalsign":66,"opticalalpha":67,"opticalalpha2":39,"opticalalphaerror":11,"opticalbeta":68,"opticalbeta2":39,"opticalbetaerror":11,"opticalgamma":69,"opticalgamma2":39,"opticalgammaerror":11,"opticalomega":39,"opticalomega2":39,"opticalomegaerror":11,"opticalepsilon":39,"opticalepsilon2":39,"opticalepsilonerror":11,"opticaln":39,"opticaln2":39,"opticalnerror":11,"optical2vcalc":70,"optical2vcalc2":39,"optical2vcalcerror":11,"optical2vmeasured":71,"optical2vmeasured2":72,"optical2vmeasurederror":11,"rimin":73,"rimax":74,"opticaldispersion":75,"opticalpleochroism":11,"opticalpleochorismdesc":11,"opticalbirefringence":11,"opticalcomments":11,"opticalcolour":11,"opticalinternal":11,"opticaltropic":11,"opticalanisotropism":11,"opticalbireflectance":11,"opticalextinction":11,"opticalr":11,"specdispm":11,"ir":11,"electrical":76,"magnetism":11,"thermalbehaviour":77,"other":78,"industrial":11,"occurrence":79,"otheroccurrence":80,"type_specimen_store":81,"description_short":82,"aboutname":83,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":84,"reviewed_at":11,"variety_of":11,"varieties":85,"group_members":86,"associates":87,"confused_with":88,"type_localities":89,"occurrence_total":101,"citations":102,"images":209,"structures":414,"synonyms":426,"language_names":429,"wikidata_qid":506,"texts":507},642,"1:1:642:6","c6c430c5-bae3-4e53-b732-1c16a75a98c0","Bertrandite","Btd",0,"mineral",null,9224,false,"Be\u003Csub>4\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)(OH)\u003Csub>2\u003C\u002Fsub>","Be\u003Csub>4\u003C\u002Fsub>Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>",[17,18,19,20],"Be","Si","O","H",[17,18,19,20],[17],",Al,Fe,Ca,","14.3.2",[26,27],"APPROVED","GRANDFATHERED",1880,"1883","9","B","D","05","56","1","Orthorhombic",6,21,"0","8.7135","15.268","4.5683",4,1,3,"Common on {011}, {021}; heart- or V-shaped twins.","Thin tabular, prismatic to needle-like.",7,"2.59","2.6","2.61","Vitreous, Pearly","Vitreous","Pearly on cleavage {001}","Transparent","White","Colourless, pale yellow",[59,60,61],"colorless","yellow","white",[61],"Perfect on {001}\r\nDistinct on {100}, {010} and {110}","Perfect","Biaxial","-","1.591","1.605","1.614","76","73","81",1.591,1.614,"r \u003C v weak","Pyroelectric.","Before the blowpipe, infusible, but becomes opaque.","Insoluble in nitric acid.","In pegmatite.","Granite fissures or miarolitic cavities, pegmatites, greisen. Alteration product of beryl, rarely primary mineral.","National School of Mines, Paris, France.","A common hydrothermal alteration product of beryl.","Named by Alexis Damour in honor of Émile Bertrand (1844 - 16 November 1909), French mineralogist and co-founder of the Société française de Minéralogie.","2025-08-11 12:14:18",[],[],[],[],[90,96],{"id":91,"txt":92,"latitude":93,"longitude":94,"country":95},4400,"Petit-Port, Nantes, Nantes, Loire-Atlantique, Pays de la Loire, France",47.2429766,-1.5565874,"France",{"id":97,"txt":98,"latitude":99,"longitude":100,"country":95},4401,"Barbin quarry, Nantes, Nantes, Loire-Atlantique, Pays de la Loire, France",47.2283333,-1.5575,607,[103,107,111,116,120,125,128,133,138,143,148,152,157,161,165,169,173,177,181,185,189,193,197,201,205],{"id":104,"year":28,"html":105,"doi":106},399063,"Bertrand, Émile (1880) Nouveau minéral des environs de Nantes. \u003Ci>Bulletin de Minéralogie\u003C\u002Fi>,  3 (4). 96-100 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3406\u002Fbulmi.1880.1566'>doi:10.3406\u002Fbulmi.1880.1566\u003C\u002Fa>","10.3406\u002Fbulmi.1880.1566",{"id":108,"year":109,"html":110,"doi":11},16102911,1882,"Des Cloizeaux (1882) Note sur la probabilité de l'existence à Barbin, près Nantes, du nouveau silicate d'alumine, fer et chaux de Petit-Port décrit par M. Bertrand en 1880. Bulletin de la Societe Mineralogique de France: 5: 176.",{"id":112,"year":113,"html":114,"doi":115},399290,1883,"Bertrand, Emile (1883) Nouveau minéral des environs de Nantes [bertrandite]. \u003Ci>Bulletin de Minéralogie\u003C\u002Fi>,  6 (8) 248-252 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3406\u002Fbulmi.1883.1823'>doi:10.3406\u002Fbulmi.1883.1823\u003C\u002Fa>","10.3406\u002Fbulmi.1883.1823",{"id":117,"year":113,"html":118,"doi":119},399291,"Damour, Augustin-Alexis (1883) Note et analyse sur le nouveau minéral des environs de Nantes. \u003Ci>Bulletin de Minéralogie\u003C\u002Fi>,  6 (8). 252-254 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3406\u002Fbulmi.1883.1824'>doi:10.3406\u002Fbulmi.1883.1824\u003C\u002Fa>","10.3406\u002Fbulmi.1883.1824",{"id":121,"year":122,"html":123,"doi":124},101763,1888,"Scharizer, R. (1888) Der Bertrandit von Pisek. \u003Ci>Zeitschrift für Kristallographie\u003C\u002Fi>,  14 (1). 33-42 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1888.14.1.33'>doi:10.1524\u002Fzkri.1888.14.1.33\u003C\u002Fa>","10.1524\u002Fzkri.1888.14.1.33",{"id":126,"year":122,"html":127,"doi":11},16102915,"Penfield, Samuel Lewis (1888) Bertrandite from Mount Antero, Colorado. \u003Ci>American Journal of Science\u003C\u002Fi>,  s3-36 (211). p.52-55. \u003Ca target='_blank' href='https:\u002F\u002Fajsonline.org\u002Farticle\u002F62906.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":129,"year":130,"html":131,"doi":132},4835,1911,"Bowman, H. L. (1911) On the occurrence of Bertrandite at the Cheesewring Quarry, near Liskeard, Cornwall. \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>,  16 (73) 47-50 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1911.016.073.06'>doi:10.1180\u002Fminmag.1911.016.073.06\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_16\u002F16-73-47.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1911.016.073.06",{"id":134,"year":135,"html":136,"doi":137},103283,1912,"Vogt, Thorolf (1912) II. Bertrandit von Iveland im südlichen Norwegen. \u003Ci>Zeitschrift für Kristallographie - Crystalline Materials\u003C\u002Fi>,  50 (1) 6 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1912.50.1.6'>doi:10.1524\u002Fzkri.1912.50.1.6\u003C\u002Fa>","10.1524\u002Fzkri.1912.50.1.6",{"id":139,"year":140,"html":141,"doi":142},4897,1913,"Russell, Arther (1913) Notes on the occurrence of Bertrandite at some new localities in Cornwall. \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>,  17 (78) 15-21 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1913.017.78.04'>doi:10.1180\u002Fminmag.1913.017.78.04\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_17\u002F17-78-15.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1913.017.78.04",{"id":144,"year":145,"html":146,"doi":147},104691,1932,"Ito, T., West, J. (1932) The Structure of Bertrandite (H\u003Csub>2\u003C\u002Fsub>Be\u003Csub>4\u003C\u002Fsub>Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>9\u003C\u002Fsub>) \u003Ci>Zeitschrift für Kristallographie - Crystalline Materials\u003C\u002Fi>,  83 (1) 384-393 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1932.83.1.384'>doi:10.1524\u002Fzkri.1932.83.1.384\u003C\u002Fa>","10.1524\u002Fzkri.1932.83.1.384",{"id":149,"year":150,"html":151,"doi":11},520465,1936,"Pough, Frederick H. (1936) Bertrandite and epistilbite from Bedford, New York. \u003Ci>American Mineralogist\u003C\u002Fi>,  21 (4) 264-265 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM21\u002FAM21_264.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":153,"year":154,"html":155,"doi":156},4116,1940,"Phemister, James (1940) Note on an occurrence of bertrandite and beryl at the South Crofty mine, Cornwall (With Plate XXV.) \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>,  25 (170) 573-578 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1940.025.170.01'>doi:10.1180\u002Fminmag.1940.025.170.01\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_25\u002F25-170-573.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1940.025.170.01",{"id":158,"year":159,"html":160,"doi":11},523474,1960,"Vernon, R. H., Williams, K. L. (1960) Bertrandite from Mica Creek, Queensland. \u003Ci>American Mineralogist\u003C\u002Fi>,  45 (11-12) 1300-1303 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM45\u002FAM45_1300.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":162,"year":163,"html":164,"doi":11},16102921,1965,"Solov'eva, L.P., Belov, N.V. (1965) Precise determination of the crystal structure of bertrandite Be4[Si2O7](OH)2. Soviet Physics - Crystallography: 9: 458-460.",{"id":166,"year":167,"html":168,"doi":11},16102922,1967,"Andersen, S. (1967) On beryllonite and bertrandite from the Ilimaussaq alkaline intrusion, South Greenland. Contribution to the mineralogy of Ilimaussaq. Gronlands Geol. Undersoeg., Bull.: 181(0068-005): 11 A 25.",{"id":170,"year":167,"html":171,"doi":172},6034,"Morgan, W. C. (1967) Genthelvite and bertrandite from the Cairngorm Mountains, Scotland. \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>,  36 (277) 60-63 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1967.036.277.08'>doi:10.1180\u002Fminmag.1967.036.277.08\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_36\u002F36-277-60.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1967.036.277.08",{"id":174,"year":175,"html":176,"doi":11},12906928,1975,"Henderson, William A. Jr. (1975) The Bertrandites of Connecticut, in \u003Ci>May - June 1975\u003C\u002Fi>. \u003Ci>The Mineralogical Record\u003C\u002Fi>,  6 (3) Tucson. 114-123",{"id":178,"year":179,"html":180,"doi":11},16102925,1980,"Baxter, J.W. and Bradbury, J.C. (1980) Bertrandite at Hicks Dome, Hardin County, Illinois. Illinois State Academy of Science: 73: 1–13.",{"id":182,"year":183,"html":184,"doi":11},16102926,1983,"Hazen, R.M.; Finger, L.W.; Barton, M.D. (1983) High-pressure crystal structures and compressibilities of bertrandite, beryl, and euclase. Carnegie Institution of Washington Year Book: 82(1905): 357-359.",{"id":186,"year":187,"html":188,"doi":11},17094720,1986,"Hemingway, Bruce S., Barton, Mark D., Robie, R. A., Haselton, H. T. (1986) Heat capacities and thermodynamic functions for beryl, Be\u003Csub>3\u003C\u002Fsub>Al\u003Csub>2\u003C\u002Fsub>Si\u003Csub>6\u003C\u002Fsub>O\u003Csub>18\u003C\u002Fsub>, phenakite, Be\u003Csub>2\u003C\u002Fsub>SiO\u003Csub>4\u003C\u002Fsub>, euclase, BeAlSiO\u003Csub>4\u003C\u002Fsub>(OH), bertrandite, Be\u003Csub>4\u003C\u002Fsub>Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>, and chrysoberyl, BeAl\u003Csub>2\u003C\u002Fsub>O\u003Csub>4\u003C\u002Fsub>. \u003Ci>American Mineralogist\u003C\u002Fi>,  71 (3-4) 557-568 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM71\u002FAM71_557.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":190,"year":187,"html":191,"doi":192},151507,"Hazen, Robert M., Au, Andrew Y. (1986) High-pressure crystal chemistry of phenakite (Be\u003Csub>2\u003C\u002Fsub>SiO\u003Csub>4\u003C\u002Fsub>) and bertrandite (Be\u003Csub>4\u003C\u002Fsub>Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>) \u003Ci>Physics and Chemistry of Minerals\u003C\u002Fi>,  13 (2) 69-78 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf00311896'>doi:10.1007\u002Fbf00311896\u003C\u002Fa>","10.1007\u002Fbf00311896",{"id":194,"year":195,"html":196,"doi":11},528352,1987,"Downs, James W., Ross, F. K. (1987) Neutron-diffraction study of bertrandite. \u003Ci>American Mineralogist\u003C\u002Fi>,  72 (9-10) 979-983 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM72\u002FAM72_979.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":198,"year":195,"html":199,"doi":200},151581,"Hofmeister, A. M., Hoering, T. C., Virgo, D. (1987) Vibrational spectroscopy of beryllium aluminosilicates: Heat capacity calculations from band assignments. \u003Ci>Physics and Chemistry of Minerals\u003C\u002Fi>,  14 (3) 205-224 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf00307985'>doi:10.1007\u002Fbf00307985\u003C\u002Fa>","10.1007\u002Fbf00307985",{"id":202,"year":203,"html":204,"doi":11},17054161,1992,"Giuseppetti, G., Tadini, C., Mattioli, V. (1992) Bertrandite: Be\u003Csub>4\u003C\u002Fsub>Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>, from Val Vigezzo (NO) Italy: the X-ray structural refinement. \u003Ci>Neues Jahrbuch für Mineralogie - Monatshefte\u003C\u002Fi>,  1992. 13-19",{"id":206,"year":207,"html":208,"doi":11},16963206,2001,"(2001) Bertrandite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fbertrandite.pdf' class='refpdflink'>\u003C\u002Fa>",[210,220,229,237,245,255,263,270,279,289,296,303,310,317,324,332,339,346,354,360,367,373,382,390,397,405],{"id":211,"source_url":212,"license_code":213,"credit_html":214,"title":215,"description":216,"author":217,"original_width":218,"original_height":219},3149,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10127086","CC BY-SA 3.0","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10127086\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-38545.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Golconda pegmatite, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGovernador_Valadares\" class=\"extiw\" title=\"en:Governador Valadares\">Governador Valadares\u003C\u002Fa>, Doce valley, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMinas_Gerais\" class=\"extiw\" title=\"en:Minas Gerais\">Minas Gerais\u003C\u002Fa>, Southeast Region, Brazil (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-4513.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>This specimen hails from a onetime find, probably 25 years ago, and was brought out by Carlos Barbosa (from whom this specimen came). This is supposed to have been his best keeper, and stands on its own merit regardless as a superbly formed miniature with extremely large crystals for the species balanced on a bit of matrix . Irreplaceable! 5.3 x 4.1 x 2.7 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",613,800,{"id":221,"source_url":222,"license_code":223,"credit_html":224,"title":225,"description":226,"author":227,"original_width":228,"original_height":228},35607,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=1955979","Public domain","Dave Dyet http:\u002F\u002Fwww.shutterstone.com http:\u002F\u002Fwww.dyet.com, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=1955979\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite Hydrous Berylium Silicate Governour Valadares Minas Gerais Brazil 1961.jpg","These mineral images are free to use how you wish.","Dave Dyet http:\u002F\u002Fwww.shutterstone.com http:\u002F\u002Fwww.dyet.com",640,{"id":230,"source_url":231,"license_code":213,"credit_html":232,"title":233,"description":234,"author":217,"original_width":235,"original_height":236},3150,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10139388","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10139388\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-118734.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Golconda pegmatite, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGovernador_Valadares\" class=\"extiw\" title=\"en:Governador Valadares\">Governador Valadares\u003C\u002Fa>, Doce valley, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMinas_Gerais\" class=\"extiw\" title=\"en:Minas Gerais\">Minas Gerais\u003C\u002Fa>, Southeast Region, Brazil (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-4513.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 6.2 x 4.2 x 2 cm.\u003C\u002Fdd>\n\u003Cdd>Distinctive sparkling crust composed of hundreds upon hundreds of gemmy clear Bertandite crystals in the 1-2 mm range.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",500,496,{"id":238,"source_url":239,"license_code":213,"credit_html":240,"title":241,"description":242,"author":217,"original_width":243,"original_height":244},3151,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10165921","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10165921\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-243409.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Strickland Quarry, Collins Hill, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPortland\" class=\"extiw\" title=\"en:Portland\">Portland\u003C\u002Fa>, Middlesex County, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FConnecticut\" class=\"extiw\" title=\"en:Connecticut\">Connecticut\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3708.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 2.9 x 2.3 x 1.7 cm.\u003C\u002Fdd>\n\u003Cdd>An excellent, rich and rarely available bertrandite specimen from the Strickland Quarry of Connecticut. Lustrous, tan plates of bertrandite in well-placed clusters or as isolated crystals are richly scattered on both sides of the matrix on this very fine old-time piece from a classic New England locale. Very highly representative of the species and locale. Ex. N.A. Wintringham Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",600,482,{"id":246,"source_url":247,"license_code":248,"credit_html":249,"title":250,"description":251,"author":252,"original_width":253,"original_height":254},3153,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80624258","CC BY 3.0","Kelly Nash, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80624258\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-437576.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality:  Golconda pegmatite field, Governador Valadares, Minas Gerais, Brazil\u003C\u002Fdd>\n\u003Cdd>\u003Ci>Original description:\u003C\u002Fi> Bertrandite crystal cluster, 6 mm., Golconda Pegmatite. From Dave Shannon, 1999. K. Nash specimen and photo.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Kelly Nash",634,561,{"id":256,"source_url":257,"license_code":223,"credit_html":258,"title":259,"description":260,"author":261,"original_width":228,"original_height":262},3154,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80628838","Fernando Brederodes, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80628838\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-635672.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa> (Field of view 5 mm)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Golconda pegmatite field, Governador Valadares, Minas Gerais, Brazil\u003C\u002Fdd>\n\u003Cdd>\u003Ci>Original description:\u003C\u002Fi> group of transparent crystals Bertrandite; Photo and collection Fernando Brederodes.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Fernando Brederodes",480,{"id":264,"source_url":265,"license_code":213,"credit_html":266,"title":267,"description":268,"author":217,"original_width":269,"original_height":235},35610,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10165488","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10165488\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-240594.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Kara-Oba W deposit, Betpakdala Desert (Bet-Pak-Dal Desert), Qaraghandy Oblysy (Karaganda Oblast'), Kazakhstan (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-2222.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 4.7 x 3.8 x 3.6 cm.\u003C\u002Fdd>\n\u003Cdd>Lustrous white blades of Bertrandite, up to about .8 cm, resting on and intermixed with numerous rhombs of pinkish-brown Rhodochrosite. There are also Pyrite cubes, micro Mica, Quartz, and a tungstate, possibly Wolframite. An excellent, and quite classic, combination specimen from a well-known locality. Ex. Charlie Key stock.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",491,{"id":271,"source_url":272,"license_code":248,"credit_html":273,"title":274,"description":275,"author":276,"original_width":277,"original_height":278},3155,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80629113","César Menor-Salván, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80629113\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-726840.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Assunção Mine, Aldeia Nova, Ferreira de Aves, Sátão, Viseu, Portugal\u003C\u002Fdd>\n\u003Cdd>Field of View: 5 mm\u003C\u002Fdd>\n\u003Cdd>Crystals analyzed by Raman spectrometry.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","César Menor-Salván",3264,2448,{"id":280,"source_url":281,"license_code":282,"credit_html":283,"title":284,"description":285,"author":286,"original_width":287,"original_height":288},3156,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113747271","CC BY-SA 4.0","Koreller, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113747271\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Muséum de Nantes - 438 - Bertrandite (Nantes, France).jpg","Bertrandite, en provenance de Nantes (France), au Muséum de Nantes","Koreller",4272,2848,{"id":290,"source_url":291,"license_code":213,"credit_html":292,"title":293,"description":294,"author":217,"original_width":235,"original_height":295},35611,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175799","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175799\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-Apatite-(CaF)-120791.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FApatite\" class=\"extiw\" title=\"en:Apatite\">Apatite-(CaF)\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Golconda pegmatite, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGovernador_Valadares\" class=\"extiw\" title=\"en:Governador Valadares\">Governador Valadares\u003C\u002Fa>, Doce valley, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMinas_Gerais\" class=\"extiw\" title=\"en:Minas Gerais\">Minas Gerais\u003C\u002Fa>, Southeast Region, Brazil (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-4513.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 3.7 x 2.8 x 1.1 cm.\u003C\u002Fdd>\n\u003Cdd>Superb specimen of Bertrandite crystals laced with Fluorapatites. The Bertandites are fabulous hexagonal tabular to barrel-shaped crystals that are gemmy and clear with perfect luster. The Fluorapatites are purple and gemmy tabular crystals that average about 3 cm in size, and course throughout the specimen in very attractive veins that add much to the overall aesthetics of the specimen.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",362,{"id":297,"source_url":298,"license_code":248,"credit_html":299,"title":300,"description":301,"author":302,"original_width":228,"original_height":262},35618,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80622850","John Sobolewski (JSS), via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80622850\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-224819.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Kara-Oba W deposit, Betpakdala Desert (Bet-Pak-Dal Desert), Karazhal, Karaganda Region, Kazakhstan\u003C\u002Fdd>\n\u003Cdd>\u003Ci>Original description:\u003C\u002Fi> A 4.5 by 3.2 floater group of Quartz crystals sprinkled with small sparkly crystals of Bertrandite. JSS specimen and photo.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","John Sobolewski (JSS)",{"id":304,"source_url":305,"license_code":282,"credit_html":306,"title":307,"description":285,"author":286,"original_width":308,"original_height":309},35623,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113747267","Koreller, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113747267\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Muséum de Nantes - 437 - Bertrandite (Nantes, France).jpg",3092,2680,{"id":311,"source_url":312,"license_code":282,"credit_html":313,"title":314,"description":285,"author":286,"original_width":315,"original_height":316},35624,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113747294","Koreller, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113747294\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Muséum de Nantes - 450 - Bertrandite (Nantes, France).jpg",2356,2268,{"id":318,"source_url":319,"license_code":282,"credit_html":320,"title":321,"description":285,"author":286,"original_width":322,"original_height":323},35625,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113748518","Koreller, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113748518\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Muséum de Nantes - 451 - Bertrandite (Nantes, France).jpg",3752,2640,{"id":325,"source_url":326,"license_code":213,"credit_html":327,"title":328,"description":329,"author":217,"original_width":330,"original_height":331},35608,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10145619","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10145619\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-Beryl-Quartz-148304.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBeryl\" class=\"extiw\" title=\"en:Beryl\">Beryl\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAquamarine\" class=\"extiw\" title=\"en:Aquamarine\">Aquamarine\u003C\u002Fa>), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuartz\" class=\"extiw\" title=\"en:Quartz\">Quartz\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSmoky_quartz\" class=\"extiw\" title=\"en:Smoky quartz\">Smoky Quartz\u003C\u002Fa>)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMount_Antero\" class=\"extiw\" title=\"en:Mount Antero\">Mt Antero\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FChaffee_County,_Colorado\" class=\"extiw\" title=\"en:Chaffee County, Colorado\">Chaffee County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FColorado\" class=\"extiw\" title=\"en:Colorado\">Colorado\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3597.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 5.5 x 4.7 x 4.5 cm.\u003C\u002Fdd>\n\u003Cdd>An historic, old-time Colorado combination specimen from the Harvard University and George Elling Collections. Water-clear bertrandite blades to 5 mm are adjacent to smoky quartz crystals in a smoky quartz matrix with sea-green aquamarine fragments. A RARE, classic and representative Mt. Antero combo piece.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",494,562,{"id":333,"source_url":334,"license_code":213,"credit_html":335,"title":336,"description":337,"author":217,"original_width":243,"original_height":338},35609,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10163833","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10163833\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-Quartz-230542.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuartz\" class=\"extiw\" title=\"en:Quartz\">Quartz\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Kara-Oba W deposit, Betpakdala Desert (Bet-Pak-Dal Desert), Qaraghandy Oblysy (Karaganda Oblast'), Kazakhstan (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-2222.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 6.0 x 4.3 x 3.7 cm.\u003C\u002Fdd>\n\u003Cdd>Gemmy, tabular, colorless bertrandite crystals to 9 mm are aesthetically scattered on the mounded, cemented matrix of quartz and smoky quartz crystals with accenting pyrite cubes. This specimen is from the Kara-Oba deposit of Kazakhstan.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",534,{"id":340,"source_url":341,"license_code":213,"credit_html":342,"title":343,"description":344,"author":217,"original_width":235,"original_height":345},35612,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177257","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177257\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Apatite-(CaF)-Bertrandite-Albite-249296.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FApatite\" class=\"extiw\" title=\"en:Apatite\">Apatite-(CaF)\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAlbite\" class=\"extiw\" title=\"en:Albite\">Albite\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPlagioclase\" class=\"extiw\" title=\"en:Plagioclase\">Cleavelandite\u003C\u002Fa>)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Golconda pegmatite, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGovernador_Valadares\" class=\"extiw\" title=\"en:Governador Valadares\">Governador Valadares\u003C\u002Fa>, Doce valley, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMinas_Gerais\" class=\"extiw\" title=\"en:Minas Gerais\">Minas Gerais\u003C\u002Fa>, Southeast Region, Brazil (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-4513.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 5.2 x 5.2 x 2.4 cm.\u003C\u002Fdd>\n\u003Cdd>Fine, gemmy, lustrous, striated, vivid purple apatite crystals are richly and aesthetically strewn across the crest of a wedge of pearlescent cleavelandite blades on this beautiful specimen from the Golconda Mine of Brazil. The large apatite is 1.4 cm and it is doubly terminated. They are glowing purple, a unique and very intense color. The apatites are very nicely accented by hundreds of sparkly, pastel-yellow bertrandite microcrystals. This is an excellent older combination specimen from this mine.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",474,{"id":347,"source_url":348,"license_code":213,"credit_html":349,"title":350,"description":351,"author":217,"original_width":352,"original_height":353},35613,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10429694","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10429694\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-Quartz-Rhodochrosite-d05-69c.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuartz\" class=\"extiw\" title=\"en:Quartz\">Quartz\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRhodochrosite\" class=\"extiw\" title=\"en:Rhodochrosite\">Rhodochrosite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Kounrad Massif, Balqash (Balkhash; Karatas; Prebalkhashie) Region, Zhezqazghan Oblysy (Dzezkazgan Oblast'; Dzhezkazgan Oblast'; Djezkazgan Oblast'; Jezkazgan Oblast'), Kazakhstan (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-18659.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 6.7 x 4.3 x 2.1 cm\n\u003Cdl>\u003Cdt>Smoky Quartz with Rhodochrosite and Bertrandite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>One of the best examples from the locality that I have seen, with a sharp 1.8 x 1.5 x 0.5 cm disc-shaped rhodo perched on the edge of a stunning smoky crystal! 6.7 x 4.3 x 2.1 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",400,300,{"id":355,"source_url":356,"license_code":213,"credit_html":357,"title":358,"description":351,"author":217,"original_width":352,"original_height":359},35614,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10429695","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10429695\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-Quartz-Rhodochrosite-d05-69b.jpg",336,{"id":361,"source_url":362,"license_code":213,"credit_html":363,"title":364,"description":365,"author":217,"original_width":366,"original_height":352},35615,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10452082","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10452082\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-Fluorapatite-Fluorite-m06-18a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FApatite\" class=\"extiw\" title=\"en:Apatite\">Apatite-(CaF)\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFluorite\" class=\"extiw\" title=\"en:Fluorite\">Fluorite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Aqshatau Mine, Aqshatau (Akchatau; Akschatau; Akchataul), Qaraghandy Oblysy (Karaganda Oblast'), Kazakhstan (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-2219.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 9.2 x 5.0 x 5.0 cm\n\u003Cdl>\u003Cdt>Fluorite, Fluorapatite, and Bertrandite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>These unbelieveable combos came out in the late 1980s and were promptly sold as AQUAMARINE specimens....for awhile. However, they have retained a high value as phenomenal APATITE specimens, and espeically when in such beautiful combination they are hard to come by today. martin Zinn had the biggest stash of them from this small find,and the pieces such as this that came to market when his collection was dispersed are by far the best on the market in recent years. This is a great piece because it has good fluorite and good quality apatite, but also lots of it - making for wonderful color contrast against the crysatllized matrix loaded with white bertrandite. To this day, these remain one of the most desirable things out of Russia from the 1980s and 1990s.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",313,{"id":368,"source_url":369,"license_code":213,"credit_html":370,"title":371,"description":365,"author":217,"original_width":219,"original_height":372},35616,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10452084","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10452084\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-Fluorapatite-Fluorite-m06-18b.jpg",520,{"id":374,"source_url":375,"license_code":213,"credit_html":376,"title":377,"description":378,"author":379,"original_width":380,"original_height":381},35617,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=14866303","Leon Hupperichs, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=14866303\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite-Quartz-101593.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuartz\" class=\"extiw\" title=\"en:Quartz\">Quartz\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Kara-Oba W deposit, Betpakdala Desert (Bet-Pak-Dal Desert), Qaraghandy Oblysy (Karaganda Oblast'), Kazakhstan (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-2222.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>White crystals of Bertrandite together with Smoky Quartz. Field of view 10 mm. Specimen and photo Leon Hupperichs.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Leon Hupperichs",805,614,{"id":383,"source_url":384,"license_code":213,"credit_html":385,"title":386,"description":387,"author":217,"original_width":388,"original_height":389},35619,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80624132","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80624132\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite, Beryl (variety Aquamarine)-396688.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>; Beryl, variety \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAquamarine\" class=\"extiw\" title=\"en:Aquamarine\">Aquamarine\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Mount Antero, Chaffee County, Colorado, USA\u003C\u002Fdd>\n\u003Cdd>Size: 2.6 cm x 1.7 cm x 1.3 cm\u003C\u002Fdd>\n\u003Cdd>A historic, old-time and rare Colorado combination thumbnail from the Columbia University and Richard Hauck Collections. Glassy, tabular bertrandite crystals to 4 mm are richly clustered on two sides of the lustrous, blue-green aquamarine crystal. This is a rare, classic and representative Mt. Antero combination piece. One old label has Thomas Egleston named on the back. Thomas Egleston founded the School of Mines at Columbia University in 1864 and was Professor of Mineralogy and Metallurgy until he retired in 1897. The rare mercury oxyhalide, eglestonite, is named after him.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",465,547,{"id":391,"source_url":392,"license_code":213,"credit_html":393,"title":394,"description":395,"author":217,"original_width":396,"original_height":243},35620,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80627427","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80627427\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite, Pyrite, Quartz-566031.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPyrite\" class=\"extiw\" title=\"en:Pyrite\">Pyrite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuartzQuartz\" class=\"extiw\" title=\"en:QuartzQuartz\">Quartz\u003C\u002Fa> (Variety Smoky Quartz)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Dimensions: 9 cm x 5 cm x 3 cm\u003C\u002Fdd>\n\u003Cdd>Locality: Kara-Oba W deposit, Betpakdala Desert (Bet-Pak-Dal Desert), Karazhal, Karaganda Region, Kazakhstan\u003C\u002Fdd>\n\u003Cdd>Dozens of sharp, snow-white bertrandite prisms are scattered on all sides of the glassy smoky quartz crystal on this striking and excellent combination piece from this well-known locale. The prisms reach 1.2 cm, large for the locale. Sparkly pyrite microcrystals and a yellowish carbonate are fine accents to the bertrandites. The smoky quartz has a water-clear termination with a sharp phantom and progressively becomes darker and has more inclusions lower in the crystal. Ex. Bob Trimingham Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",388,{"id":398,"source_url":399,"license_code":213,"credit_html":400,"title":401,"description":402,"author":379,"original_width":403,"original_height":404},35621,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80628556","Leon Hupperichs, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80628556\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bertrandite, Fluorite, Quartz-601466.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFluorite\" class=\"extiw\" title=\"en:Fluorite\">Fluorite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuartz\" class=\"extiw\" title=\"en:Quartz\">Quartz\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Dimensions: 5.0 cm x 1.9 cm x 1.3 cm\u003C\u002Fdd>\n\u003Cdd>Locality: Sauberg Mine, Ehrenfriedersdorf, Erzgebirgskreis, Saxony, Germany\u003C\u002Fdd>\n\u003Cdd>Orange-pink bertrandite crystals and some fluorite cubes on a 5 cm large quartz crystal, from the Prinzler vein, Level 4, Sauberg Mine.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",968,928,{"id":406,"source_url":407,"license_code":213,"credit_html":408,"title":409,"description":410,"author":411,"original_width":412,"original_height":413},27102,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=65638643","Beppe Finello, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=65638643\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Uranospinite, Bertrandite-834101.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FUranospinite\" class=\"extiw\" title=\"en:Uranospinite\">Uranospinite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBertrandite\" class=\"extiw\" title=\"en:Bertrandite\">Bertrandite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Field of view: 2.5 mm\u003C\u002Fdd>\n\u003Cdd>Locality: Montoso Quarries, Bagnolo Piemonte, Cuneo Province, Piedmont, Italy\u003C\u002Fdd>\n\u003Cdd>Original description: Yellow uranospinite crystals and on the left side, very small twin crystal of bertrandite (partially out of focus) - Sample self collected at the Rocche Grana quarry, Montoso. Collection and photo: Giuseppe Finello.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Beppe Finello",1457,970,[415,421],{"id":416,"url":417,"label":418,"formula":419,"spacegroup":420,"year":195},1452,"\u002Fcif\u002F1452.cif","Downs 1987","Si2 Be4 H2 O9","C m c 21",{"id":422,"url":423,"label":424,"formula":425,"spacegroup":420,"year":187},1453,"\u002Fcif\u002F1453.cif","Hazen 1986","Be4 Si2 O9 H2",[427,428],"Hessenbergit","Hessenbergite",[430,434,438,442,445,448,452,455,459,463,466,470,474,477,481,485,488,492,495,498,501],{"lang":431,"names":432},"ar",[433],"بيرترانديت",{"lang":435,"names":436},"az",[437],"Bertrandit",{"lang":439,"names":440},"ca",[441],"bertrandita",{"lang":443,"names":444},"da",[437],{"lang":446,"names":447},"de",[437],{"lang":449,"names":450},"es",[451],"Bertrandita",{"lang":453,"names":454},"eu",[451],{"lang":456,"names":457},"fa",[458],"برتراندیت",{"lang":460,"names":461},"fr",[462],"bertrandite",{"lang":464,"names":465},"it",[7],{"lang":467,"names":468},"ja",[469],"ベルトラン石",{"lang":471,"names":472},"mk",[473],"Бертрандит",{"lang":475,"names":476},"mn",[473],{"lang":478,"names":479},"nb",[480],"bertranditt",{"lang":482,"names":483},"nl",[484],"bertrandiet",{"lang":486,"names":487},"nn",[480],{"lang":489,"names":490},"pl",[491],"Bertrandyt",{"lang":493,"names":494},"pt",[441],{"lang":496,"names":497},"ru",[473],{"lang":499,"names":500},"uk",[473],{"lang":502,"names":503},"zh",[504,505],"矽鈹石","羟硅铍石","Q2582855",{"history":508,"applications":512},{"markdown":509,"model_version":510,"prompt_version":511,"reviewed_at":11},"Bertrandite carries the name of a man who never dug it out of the ground. It honours the French mineralogist Émile Bertrand (1844–1909), and the story of how it got that name is a small relay of credit.\n\nThe mineral first turned up near Nantes, in western France[1]. Bertrand made an early analysis of the new material in 1880[2]. The chemist Alexis Damour then completed the full description, and in 1883 named the species after him[3].\n\nBertrand was no minor figure. He helped found the Société française de minéralogie et de cristallographie, the country's main mineral-science society[4]. His name still lives on a piece of laboratory glass too — the Bertrand lens, an optical part used to study crystals under the microscope[5].","claude-opus-4-8","1.7.0",{"markdown":513,"model_version":510,"prompt_version":511,"reviewed_at":11},"More than 90 percent of the world's beryllium — the lightweight metal prized for stiff, dimensionally stable parts — is won from bertrandite ore[1]. That makes this modest white mineral the metal's single most important source.\n\nAlmost all of it comes from one place. The Spor Mountain deposit in Utah is the sole working source of beryllium in the United States, mined and processed by a single company[2].\n\nThe metal that bertrandite yields is hard to substitute. Beryllium metal goes mainly into aerospace and defence parts, chosen for its stiffness, light weight, and dimensional stability — its tendency to hold its exact shape across a wide temperature range[3].\\\nAlloyed with copper, it does a different job. Beryllium-copper alloys carry high electrical and thermal conductivity along with strength, hardness, and good corrosion and fatigue resistance, and they are nonmagnetic[4]. That mix is wanted in springs, electrical connectors, and non-sparking tools.\n\nSupply is narrow. The United States is one of only three countries that process beryllium ores into finished beryllium products, and it supplies most of the rest of the world[5]. Apparent US consumption in 2024 came to about 170 tons[6].\n\nWorking the ore demands care. Inhaling airborne beryllium dust can cause chronic beryllium disease, a serious long-term lung disease, and prolonged exposure causes lung cancer in humans — the metal is classed as a Group 1 carcinogen, meaning it is known to cause cancer in people[7]."]