[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:2976":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":8,"polytypeof":8,"groupid":8,"weighting":12,"nolocadd":13,"blacklisted":13,"mindat_formula":14,"mindat_formula_note":8,"ima_formula":8,"elements":15,"sigelements":21,"key_elements":8,"impurities":8,"cim":8,"ima_status":8,"ima_notes":8,"ima_history":8,"approval_year":8,"publication_year":8,"discovery_year":8,"strunz10ed1":22,"strunz10ed2":22,"strunz10ed3":22,"strunz10ed4":8,"dana8ed1":22,"dana8ed2":22,"dana8ed3":22,"dana8ed4":22,"csystem":8,"cclass":8,"spacegroup":8,"spacegroupset":22,"a":22,"b":22,"c":22,"alpha":22,"beta":22,"gamma":22,"aerror":8,"berror":8,"cerror":8,"alphaerror":8,"betaerror":8,"gammaerror":8,"va3":8,"z":8,"csmetamict":13,"commentcrystal":8,"twinning":8,"tranglide":8,"parting":8,"epitaxidescription":8,"morphology":8,"tlform":8,"hmin":23,"hmax":24,"hardtype":8,"vhnmin":22,"vhnmax":22,"vhnerror":8,"vhng":8,"vhns":8,"commenthard":8,"dmeas":25,"dmeas2":26,"dcalc":27,"dmeaserror":8,"dcalcerror":8,"commentdense":8,"lustre":8,"lustretype":28,"commentluster":8,"diapheny":29,"streak":30,"colour":31,"commentcolor":32,"colors":33,"streak_colors":37,"luminescence":8,"uv":38,"cleavage":39,"cleavagetype":40,"fracturetype":41,"tenacity":42,"commentbreak":43,"opticaltype":8,"opticalsign":8,"opticalalpha":22,"opticalalpha2":22,"opticalalphaerror":8,"opticalbeta":22,"opticalbeta2":22,"opticalbetaerror":8,"opticalgamma":22,"opticalgamma2":22,"opticalgammaerror":8,"opticalomega":22,"opticalomega2":22,"opticalomegaerror":8,"opticalepsilon":22,"opticalepsilon2":22,"opticalepsilonerror":8,"opticaln":22,"opticaln2":22,"opticalnerror":8,"optical2vcalc":22,"optical2vcalc2":22,"optical2vcalcerror":8,"optical2vmeasured":22,"optical2vmeasured2":22,"optical2vmeasurederror":8,"rimin":8,"rimax":8,"opticaldispersion":8,"opticalpleochroism":8,"opticalpleochorismdesc":8,"opticalbirefringence":8,"opticalcomments":8,"opticalcolour":8,"opticalinternal":8,"opticaltropic":8,"opticalanisotropism":8,"opticalbireflectance":8,"opticalextinction":8,"opticalr":8,"specdispm":8,"ir":8,"electrical":8,"magnetism":8,"thermalbehaviour":8,"other":8,"industrial":8,"occurrence":8,"otheroccurrence":8,"type_specimen_store":8,"description_short":8,"aboutname":44,"rock_parent":8,"rock_parent2":8,"rock_root":45,"rock_bgs_code":8,"meteoritical_code":8,"updttime":46,"reviewed_at":8,"variety_of":47,"varieties":55,"group_members":59,"associates":60,"confused_with":85,"type_localities":86,"occurrence_total":93,"citations":94,"images":112,"structures":244,"synonyms":256,"language_names":277,"wikidata_qid":8,"texts":278},2976,"1:1:2976:2","3d5f995d-e4d6-43a7-8f77-db7f2125d1de","Oligoclase",null,2,"variety",96,2696,false,"(Na,Ca)[Al(Si,Al)Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>]",[16,17,18,19,20],"Al","Ca","Na","Si","O",[16,18,19,20],"0",6,6.5,"2.63","2.66","2.65","Vitreous,Sub-Vitreous","Transparent,Translucent","White","Colourless, white, very pale yellow","may be green due to inclusions",[34,35,36],"colorless","white","yellow",[35],"Not usually fluorescent in SW UV; may be faint red to faint white.","{001} perfect, {010} good, {110} poor","Perfect","Irregular\u002FUneven,Sub-Conchoidal,Step-Like","brittle","The angles between the good and perfect cleavages are usually 93-94 degrees","Named in 1826 by August Breithaupt from the Greek όλίγος (\"oligos\", meaning \"little\") and κλάσις (\"klasis\", meaning \"fracture\") alluding to its cleavage.",0,"2025-10-14 13:22:08",{"id":11,"name":48,"entrytype":45,"csystem":49,"ima_formula":50,"mindat_formula":50,"hmin":23,"hmax":24,"dmeas":51,"dcalc":52,"strunz10ed1":53,"primary_image_id":54},"Albite","Triclinic","Na(AlSi\u003Csub>3\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>)","2.6","2.615","9",549,[56],{"id":57,"name":58,"entrytype":9,"csystem":8,"ima_formula":8,"mindat_formula":50,"hmin":8,"hmax":8,"dmeas":22,"dcalc":22,"primary_image_id":8},2974,"Oligoclase-Albite",[],[61,68,76],{"id":62,"name":63,"entrytype":45,"csystem":49,"ima_formula":64,"mindat_formula":65,"hmin":9,"hmax":9,"dmeas":66,"dcalc":67,"primary_image_id":8},31499,"Braithwaiteite","NaCu\u003Csup>2+\u003C\u002Fsup>\u003Csub>5\u003C\u002Fsub>(Sb\u003Csup>5+\u003C\u002Fsup>Ti\u003Csup>4+\u003C\u002Fsup>)O\u003Csub>2\u003C\u002Fsub>(AsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>4\u003C\u002Fsub>[AsO\u003Csub>3\u003C\u002Fsub>(OH)]\u003Csub>2\u003C\u002Fsub> · 8H\u003Csub>2\u003C\u002Fsub>O","NaCu\u003Csub>5\u003C\u002Fsub>(Ti\u003Csup>4+\u003C\u002Fsup>Sb\u003Csup>5+\u003C\u002Fsup>)(AsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>4\u003C\u002Fsub>(HAsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>O\u003Csub>2\u003C\u002Fsub> ·8H\u003Csub>2\u003C\u002Fsub>O","3.442","3.753",{"id":69,"name":70,"entrytype":45,"csystem":71,"ima_formula":72,"mindat_formula":73,"hmin":8,"hmax":8,"dmeas":22,"dcalc":74,"primary_image_id":75},1743,"Grayite","Hexagonal","(Th,Pb,Ca)(PO\u003Csub>4\u003C\u002Fsub>) · H\u003Csub>2\u003C\u002Fsub>O","(Th,Pb,Ca)(PO\u003Csub>4\u003C\u002Fsub>)·H\u003Csub>2\u003C\u002Fsub>O","6.41",3974,{"id":77,"name":78,"entrytype":45,"csystem":71,"ima_formula":79,"mindat_formula":80,"hmin":81,"hmax":23,"dmeas":82,"dcalc":83,"primary_image_id":84},3039,"Osumilite","KFe\u003Csub>2\u003C\u002Fsub>(Al\u003Csub>5\u003C\u002Fsub>Si\u003Csub>10\u003C\u002Fsub>)O\u003Csub>30\u003C\u002Fsub>","K◻\u003Csub>2\u003C\u002Fsub>Fe\u003Csup>2+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>Al\u003Csub>3\u003C\u002Fsub>[Al\u003Csub>2\u003C\u002Fsub>Si\u003Csub>10\u003C\u002Fsub>O\u003Csub>30\u003C\u002Fsub>]",5,"2.58","2.71",18298,[],[87],{"id":88,"txt":89,"latitude":90,"longitude":91,"country":92},3190,"Danvikstull, Stockholm, Stockholm County, Sweden",59.3136111,18.1041667,"Sweden",1126,[95,99,103,107],{"id":96,"year":97,"html":98,"doi":8},16118897,1968,"Borg, I.Y. and Smith, D.K. (1968) Calculated powder patterns: I. Five plagioclases. American Mineralogist, 53, 1709-1723.",{"id":100,"year":101,"html":102,"doi":8},16118898,1971,"Phillips, M.W., Colwell, A.A., and Ribbe, P.H. (1971) The crystal structures of two oligoclases: A comparison with low and high albite. Zeitschrift für Kristallographie 133, 43-65.",{"id":104,"year":105,"html":106,"doi":8},16966385,2001,"(2001) Oligoclase. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Foligoclase.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":108,"year":109,"html":110,"doi":111},8511121,2017,"Jin, Shiyun; Xu, Huifang (2017) Investigations of the phase relations among \u003Ci>e\u003C\u002Fi>1, \u003Ci>e\u003C\u002Fi>2 and \u003Ci>C\u003C\u002Fi>-1 structures of Na-rich plagioclase feldspars: a single-crystal X-ray diffraction study. \u003Ci>Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials\u003C\u002Fi>,  73 (5). 992-1006 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1107\u002Fs2052520617010976'>doi:10.1107\u002Fs2052520617010976\u003C\u002Fa>","10.1107\u002Fs2052520617010976",[113,123,132,139,147,153,159,166,176,185,193,198,207,217,225,235],{"id":114,"source_url":115,"license_code":116,"credit_html":117,"title":118,"description":119,"author":120,"original_width":121,"original_height":122},71234,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=4844777","CC BY-SA 3.0","Eurico Zimbres Zimbres, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=4844777\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Oligoclase cut.jpg","Some Cut Oligoclase from Brazil. Cutting by Afonso Marques","Eurico Zimbres Zimbres",682,693,{"id":124,"source_url":125,"license_code":116,"credit_html":126,"title":127,"description":128,"author":129,"original_width":130,"original_height":131},71237,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10146573","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10146573\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Albite-155007.jpg","\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\u002FOligoclase\" class=\"extiw\" title=\"en:Oligoclase\">Oligoclase\u003C\u002Fa>)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Hawk Mine, Hawk-Bakersville, Spruce Pine District, Mitchell County, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorth_Carolina\" class=\"extiw\" title=\"en:North Carolina\">North Carolina\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-11769.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 2.4 x 2.0 x 1.5 cm.\u003C\u002Fdd>\n\u003Cdd>A gemmy piece. The piece is from the American Museum of Natural History and shows a Bement collection numbering.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",800,725,{"id":133,"source_url":134,"license_code":116,"credit_html":135,"title":136,"description":137,"author":129,"original_width":130,"original_height":138},71238,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10159392","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10159392\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Albite-202037.jpg","\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\u002FOligoclase\" class=\"extiw\" title=\"en:Oligoclase\">Oligoclase\u003C\u002Fa>)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPlumtree\" class=\"extiw\" title=\"en:Plumtree\">Plumtree\u003C\u002Fa>, Spruce Pine District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAvery_County\" class=\"extiw\" title=\"en:Avery County\">Avery County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorth_Carolina\" class=\"extiw\" title=\"en:North Carolina\">North Carolina\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-102597.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 9.8 x 7.2 x 5.4 cm.\u003C\u002Fdd>\n\u003Cdd>A piece of massive, gemmy feldspar with a pleasing bluish color to it, famously used for carving in old times. It is more historic, than mineralogically interesting, as a sample from North Carolina. Ex. Academy of Natural Sciences Philadelphia Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",582,{"id":140,"source_url":141,"license_code":116,"credit_html":142,"title":143,"description":144,"author":129,"original_width":145,"original_height":146},71239,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10420353","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10420353\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Oligoclase-4jg47a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOligoclase\" class=\"extiw\" title=\"en:Oligoclase\">Oligoclase\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Pili Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSonora\" class=\"extiw\" title=\"en:Sonora\">Sonora\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-212020.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 4.5 x 3.4 x 3 cm\n\u003Cdl>\u003Cdt>Oligoclase (Moonstone)\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>Very nice cluster of tabular Oligoclase crystals from the famous find of early in the 1990s. The best-formed and most prominent of the crystals displays the beautiful opalescent play of light that these crystals are so famous for. 4.5 x 3.4 x 3 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",779,510,{"id":148,"source_url":149,"license_code":116,"credit_html":150,"title":151,"description":152,"author":129,"original_width":130,"original_height":131},71241,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10445170","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10445170\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Oligoclase-bem-36a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOligoclase\" class=\"extiw\" title=\"en:Oligoclase\">Oligoclase\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Hawk Mine, Hawk-Bakersville, Spruce Pine District, Mitchell County, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorth_Carolina\" class=\"extiw\" title=\"en:North Carolina\">North Carolina\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-11769.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: thumbnail, 2.4 x 2.0 x 1.5 cm\n\u003Cdl>\u003Cdt>Oligoclase Feldspar\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A gemmy single, etched crystal showing still some flat faces as well, from this very old locality. The piece is from the ex. American Museum of Natural History and shows a Bement collection numbering on the bottom (shown as top, for the photo here).\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",{"id":154,"source_url":155,"license_code":116,"credit_html":156,"title":157,"description":158,"author":129,"original_width":130,"original_height":138},71242,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10456275","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10456275\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Oligoclase-pas-147a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOligoclase\" class=\"extiw\" title=\"en:Oligoclase\">Oligoclase\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPlumtree\" class=\"extiw\" title=\"en:Plumtree\">Plumtree\u003C\u002Fa>, Spruce Pine District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAvery_County\" class=\"extiw\" title=\"en:Avery County\">Avery County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorth_Carolina\" class=\"extiw\" title=\"en:North Carolina\">North Carolina\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-102597.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: cabinet, 9.8 x 7.2 x 5.4 cm\n\u003Cdl>\u003Cdt>Oligoclase feldspar\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A piece of massive, gemmy feldspar with a pleasing bluish color to it, famously used for carving in old times. It is more historic, then mineralogically interesting, as a sample from NC.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",{"id":160,"source_url":161,"license_code":116,"credit_html":162,"title":163,"description":158,"author":129,"original_width":164,"original_height":165},71244,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10456277","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10456277\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Oligoclase-pas-147b.jpg",400,350,{"id":167,"source_url":168,"license_code":169,"credit_html":170,"title":171,"description":172,"author":173,"original_width":174,"original_height":175},71825,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=29832487","CC BY 3.0","Hannes Grobe\u002FAWI, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=29832487\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Oligoklas-norway hg.jpg","\u003Cp>Oligoklas (Sonnenstein)\n\u003C\u002Fp>\nFundort: Bjordammen, Norwegen","Hannes Grobe\u002FAWI",5035,3260,{"id":177,"source_url":178,"license_code":179,"credit_html":180,"title":181,"description":182,"author":183,"original_width":184,"original_height":184},71232,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=1956064","Public domain","Dave Dyet http:\u002F\u002Fwww.shutterstone.com http:\u002F\u002Fwww.dyet.com, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=1956064\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Feldspar - Oligoclase Sunstone Sodium calcium aluminum silicate India 2485.jpg","These mineral images are free to use how you wish.","Dave Dyet http:\u002F\u002Fwww.shutterstone.com http:\u002F\u002Fwww.dyet.com",700,{"id":186,"source_url":187,"license_code":188,"credit_html":189,"title":190,"description":8,"author":8,"original_width":191,"original_height":192},88932,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F127889","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\u002F127889\" rel=\"noopener\">University of Tartu, Natural History Museum\u003C\u002Fa> via Europeana","Allanite Group",1000,717,{"id":194,"source_url":195,"license_code":179,"credit_html":196,"title":197,"description":182,"author":183,"original_width":130,"original_height":130},71233,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=1956065","Dave Dyet http:\u002F\u002Fwww.shutterstone.com http:\u002F\u002Fwww.dyet.com, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=1956065\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Feldspar - Oligoclase Sodium calcium aluminum silicate near Crown Point Essex County New York 2483.jpg",{"id":199,"source_url":200,"license_code":188,"credit_html":201,"title":202,"description":203,"author":204,"original_width":205,"original_height":206},71252,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=128073945","Reinhard Kraasch, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=128073945\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Pegmatit mit Aventurin-Oligoklas (RK 2206 P1890088).jpg","\u003Ca href=\"https:\u002F\u002Fde.wikipedia.org\u002Fwiki\u002FPegmatit\" class=\"extiw\" title=\"de:Pegmatit\">Pegmatit\u003C\u002Fa> mit Aventurin-\u003Ca href=\"https:\u002F\u002Fde.wikipedia.org\u002Fwiki\u002FOligoklas\" class=\"extiw\" title=\"de:Oligoklas\">Oligoklas\u003C\u002Fa> (\"Sonnenstein\") aus Bjordammen, Norwegen – ausgestellt im \u003Ca href=\"https:\u002F\u002Fde.wikipedia.org\u002Fwiki\u002FMineralogisches_Museum_W%C3%BCrzburg\" class=\"extiw\" title=\"de:Mineralogisches Museum Würzburg\">Mineralogischen Museum Würzburg\u003C\u002Fa>","Reinhard Kraasch",3232,2427,{"id":208,"source_url":209,"license_code":210,"credit_html":211,"title":212,"description":213,"author":214,"original_width":215,"original_height":216},2999,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=94865683","CC BY 2.0","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=94865683\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Moonstone (iridescent peristerite-oligoclase feldspar) (Chupa Pegmatite Field, Mesoproterozoic, 1.75 to 2.10 Ga; at or near Chupa Bay, Karelia, Russia) 1.jpg","“Moonstone” (iridescent peristerite-oligoclase feldspar) from the Precambrian of Russia. (10.9 cm across at its widest)\n\u003Cp>The term “moonstone” has been used to refer to various materials, but properly refers to iridescent whitish-gray feldspar.  The sample shown here consists of peristerite and oligoclase feldspar.  Oligoclase is a sodium-rich plagioclase feldspar.  Peristerite consists of closely-intergrown varieties of albite (= very sodium-rich plagioclase feldspar) with slightly varying sodium and calcium contents.  Light gets split along the boundaries between the intergrown feldspars, resulting in bluish-white iridescence (see the next two photos in this album).\n\u003C\u002Fp>\u003Cp>This is a portion of a single large crystal derived from a Precambrian-aged pegmatitic granite intrusion in the White Sea area of northwestern Russia.  Pegmatitic granites have huge crystals, formed by cooling of water-rich magmas.\n\u003C\u002Fp>\u003Cp>Geologic & age: Chupa Pegmatite Field, late Mesoproterozoic, 1.75-2.10 Ga\n\u003C\u002Fp>\nLocality: at or near Chupa Bay (at or near the town of Chupa), near the western coast of the White Sea, northwestern Karelia, far-northwestern Russia","James St. John",3888,1988,{"id":218,"source_url":219,"license_code":210,"credit_html":220,"title":221,"description":222,"author":214,"original_width":223,"original_height":224},3000,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=94865686","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=94865686\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Moonstone (iridescent peristerite-oligoclase feldspar) (Chupa Pegmatite Field, Mesoproterozoic, 1.75 to 2.10 Ga; at or near Chupa Bay, Karelia, Russia) 2.jpg","“Moonstone” (iridescent peristerite-oligoclase feldspar) from the Precambrian of Russia. (field of view 5.6 cm across)\n\u003Cp>The term “moonstone” has been used to refer to various materials, but properly refers to iridescent whitish-gray feldspar.  The sample shown here consists of peristerite and oligoclase feldspar.  Oligoclase is a sodium-rich plagioclase feldspar.  Peristerite consists of closely-intergrown varieties of albite (= very sodium-rich plagioclase feldspar) with slightly varying sodium and calcium contents.  Light gets split along the boundaries between the intergrown feldspars, resulting in bluish-white iridescence.\n\u003C\u002Fp>\u003Cp>This is a portion of a single large crystal derived from a Precambrian-aged pegmatitic granite intrusion in the White Sea area of northwestern Russia.  Pegmatitic granites have huge crystals, formed by cooling of water-rich magmas.\n\u003C\u002Fp>\u003Cp>Geologic & age: Chupa Pegmatite Field, late Mesoproterozoic, 1.75-2.10 Ga\n\u003C\u002Fp>\nLocality: at or near Chupa Bay (at or near the town of Chupa), near the western coast of the White Sea, northwestern Karelia, far-northwestern Russia",3644,2428,{"id":226,"source_url":227,"license_code":228,"credit_html":229,"title":230,"description":231,"author":232,"original_width":233,"original_height":234},17892,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=163486894","CC0 1.0","Darla Sondrol, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=163486894\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Oligoclase (GeoDIL number - 2381).jpg","Oligoclase, Na(90-70%)Ca(10-30%)(Al,Si)AlSi2O8 (sodium calcium aluminum silicate), is not a well known mineral, but has been used as a semi-precious stone under the names of sunstone and moonstone. Sunstone has flashes of reddish color caused by inclusions of hematite. Oligoclase is a member of the plagioclase feldspar group.","Darla Sondrol",1828,1324,{"id":236,"source_url":237,"license_code":169,"credit_html":238,"title":239,"description":240,"author":241,"original_width":242,"original_height":243},71821,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=4342491","Ra'ike (see also: de:Benutzer:Ra'ike), via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=4342491\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Oligoclase-Sunstone from India2.jpg","Sunstone, Variety of \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOligoclase\" class=\"extiw\" title=\"en:Oligoclase\">Oligoclase\u003C\u002Fa> from India","Ra'ike (see also: de:Benutzer:Ra'ike)",1779,1471,[245,251],{"id":246,"url":247,"label":248,"formula":249,"spacegroup":250,"year":101},10137,"\u002Fcif\u002F10137.cif","Phillips 1971 · (Na.821 Ca.179) (Al1.179 Si2.821) O8","(Na.821 Ca.179) (Al1.179 Si2.821) O8","C -1",{"id":252,"url":253,"label":254,"formula":255,"spacegroup":250,"year":101},10138,"\u002Fcif\u002F10138.cif","Phillips 1971 · (Na.723 Ca.277) (Al1.277 Si2.723) O8","(Na.723 Ca.277) (Al1.277 Si2.723) O8",[257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276],"Adventurine Oligoclase","Amansit","Amansita","Amansite","Amantice","Amantit","Amantita","Amantite","Amausit","Amausita","Lluvia","Luotolit","Oligoalbite","Oligoclasita","Oligoclasite","Oligoklas","Oligoklasit","Soda-Spodumene (of Dana)","Sodium Spodumene","Tschermakite (of von Kobell)",[],{"history":8,"applications":8}]