[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:1329":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":16,"ima_formula":17,"elements":18,"sigelements":23,"key_elements":24,"impurities":25,"cim":26,"ima_status":27,"ima_notes":11,"ima_history":11,"approval_year":11,"publication_year":30,"discovery_year":31,"strunz10ed1":32,"strunz10ed2":33,"strunz10ed3":34,"strunz10ed4":35,"dana8ed1":36,"dana8ed2":37,"dana8ed3":38,"dana8ed4":37,"csystem":39,"cclass":40,"spacegroup":11,"spacegroupset":41,"a":42,"b":43,"c":44,"alpha":41,"beta":41,"gamma":41,"aerror":45,"berror":46,"cerror":47,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":11,"z":48,"csmetamict":14,"commentcrystal":49,"twinning":50,"tranglide":11,"parting":51,"epitaxidescription":11,"morphology":11,"tlform":11,"hmin":52,"hmax":40,"hardtype":11,"vhnmin":41,"vhnmax":41,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":53,"dmeas2":54,"dcalc":55,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":56,"lustretype":56,"commentluster":57,"diapheny":58,"streak":11,"colour":59,"commentcolor":11,"colors":60,"streak_colors":11,"luminescence":11,"uv":67,"cleavage":68,"cleavagetype":69,"fracturetype":11,"tenacity":70,"commentbreak":11,"opticaltype":71,"opticalsign":72,"opticalalpha":73,"opticalalpha2":74,"opticalalphaerror":11,"opticalbeta":75,"opticalbeta2":76,"opticalbetaerror":11,"opticalgamma":77,"opticalgamma2":78,"opticalgammaerror":11,"opticalomega":41,"opticalomega2":41,"opticalomegaerror":11,"opticalepsilon":41,"opticalepsilon2":41,"opticalepsilonerror":11,"opticaln":41,"opticaln2":41,"opticalnerror":11,"optical2vcalc":79,"optical2vcalc2":41,"optical2vcalcerror":11,"optical2vmeasured":80,"optical2vmeasured2":81,"optical2vmeasurederror":11,"rimin":82,"rimax":83,"opticaldispersion":84,"opticalpleochroism":85,"opticalpleochorismdesc":86,"opticalbirefringence":11,"opticalcomments":11,"opticalcolour":11,"opticalinternal":11,"opticaltropic":11,"opticalanisotropism":11,"opticalbireflectance":11,"opticalextinction":87,"opticalr":11,"specdispm":11,"ir":11,"electrical":11,"magnetism":11,"thermalbehaviour":11,"other":11,"industrial":11,"occurrence":11,"otheroccurrence":88,"type_specimen_store":89,"description_short":90,"aboutname":91,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":92,"reviewed_at":11,"variety_of":11,"varieties":93,"group_members":94,"associates":101,"confused_with":127,"type_localities":129,"occurrence_total":134,"citations":135,"images":245,"structures":446,"synonyms":473,"language_names":474,"wikidata_qid":571,"texts":572},1329,"1:1:1329:7","664e3d36-6519-4342-bdd5-b1a1eb326737","Dumortierite","Dum",0,"mineral",null,43609,3097,false,"Al(Al\u003Csub>2\u003C\u002Fsub>O)(Al\u003Csub>2\u003C\u002Fsub>O)\u003Csub>2\u003C\u002Fsub>(SiO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>(BO\u003Csub>3\u003C\u002Fsub>)","The given formula is the anhydrous end-member. Hydrogen incorporation leads to a more complex formula:\r\n\r\n(Al,[])[Al\u003Csub>2\u003C\u002Fsub>(O,OH)](Al\u003Csub>2\u003C\u002Fsub>O)\u003Csub>2\u003C\u002Fsub>[SiO\u003Csub>3\u003C\u002Fsub>(O,OH)]\u003Csub>3\u003C\u002Fsub>(BO\u003Csub>3\u003C\u002Fsub>)","AlAl\u003Csub>6\u003C\u002Fsub>BSi\u003Csub>3\u003C\u002Fsub>O\u003Csub>18\u003C\u002Fsub>",[19,20,21,22],"Al","Si","B","O",[19,20,21,22],[21],",Fe,Ti,Mg,Ca,","17.5.25",[28,29],"APPROVED","GRANDFATHERED",1881,"1879","9","A","J","10","54","1","2","Orthorhombic",8,"0","11.828","20.243","4.7001",1,3,5,4,"Non-standard space group setting (Pmcn).","Common on {110} sometimes producing trillings.","parting on {001}",7,"3.21","3.41","3.45","Vitreous","Vitreous to dull.","Translucent","Blue, greenish-blue, violet-blue, pale blue, pink, red",[61,62,63,64,65,66],"blue","pink","red","yellow","colorless","purple","blue shortwave-excited luminescence excited by SW UV caused by titanate groups (TiO\u003Csub>6\u003C\u002Fsub>)","Distinct on {100}, poor on {110},","Distinct\u002FGood","brittle","Biaxial","-","1.659","1.678","1.684","1.691","1.686","1.692","30","20","52",1.659,1.692,"r > v or r \u003C v","Strong","X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue.","Parallel. X = c; Y = b; Z = a.","In Al rich regionally metamorphosed rocks disseminated and in veinlets cutting schist, also in pegmatitic veins.","Muséum Nationale d’Histoire Naturelle, Paris, France, numbers 83.63 (holotype), 93.311 (cotype), 95.10 (cotype).","Closely related to holtite.","Named in honour of Eugène Dumortier (3 December 1801, Lyon, France – 13 August 1876, Lyon, France), palaeontologist who wrote 'Études Paléontologiques sur les dépôts jurassiques du Bassin du Rhône'.","2026-03-11 13:41:41",[],[95],{"id":96,"name":97,"entrytype":9,"csystem":39,"ima_formula":98,"mindat_formula":99,"hmin":52,"hmax":40,"dmeas":41,"dcalc":100,"primary_image_id":11},2473,"Magnesiodumortierite","MgAl\u003Csub>6\u003C\u002Fsub>BSi\u003Csub>3\u003C\u002Fsub>O\u003Csub>17\u003C\u002Fsub>(OH)","Mg(Al\u003Csub>2\u003C\u002Fsub>OH)(Al\u003Csub>2\u003C\u002Fsub>O)\u003Csub>2\u003C\u002Fsub>(SiO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>(BO\u003Csub>3\u003C\u002Fsub>)","3.22",[102,111,120],{"id":103,"name":104,"entrytype":9,"csystem":39,"ima_formula":105,"mindat_formula":106,"hmin":107,"hmax":52,"dmeas":108,"dcalc":109,"primary_image_id":110},2254,"Kornerupine","(Mg,Fe\u003Csup>2+\u003C\u002Fsup>,Al,◻)\u003Csub>10\u003C\u002Fsub>(Si,Al,B)\u003Csub>5\u003C\u002Fsub>O\u003Csub>21\u003C\u002Fsub>(OH,F)\u003Csub>2\u003C\u002Fsub>","Mg\u003Csub>3\u003C\u002Fsub>Al\u003Csub>6\u003C\u002Fsub>(Si,Al,B)\u003Csub>5\u003C\u002Fsub>O\u003Csub>21\u003C\u002Fsub>(OH)",6,"3.29","3.288",13557,{"id":112,"name":113,"entrytype":9,"csystem":114,"ima_formula":115,"mindat_formula":115,"hmin":116,"hmax":107,"dmeas":117,"dcalc":118,"primary_image_id":119},2356,"Lazulite","Monoclinic","MgAl\u003Csub>2\u003C\u002Fsub>(PO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>",5.5,"3.122","3.144",14167,{"id":121,"name":122,"entrytype":9,"csystem":114,"ima_formula":123,"mindat_formula":123,"hmin":107,"hmax":107,"dmeas":124,"dcalc":125,"primary_image_id":126},3596,"Scorzalite","Fe\u003Csup>2+\u003C\u002Fsup>Al\u003Csub>2\u003C\u002Fsub>(PO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>","3.33","3.32",21923,[128],{"id":96,"name":97,"entrytype":9,"csystem":39,"ima_formula":98,"mindat_formula":99,"hmin":52,"hmax":40,"dmeas":41,"dcalc":100,"primary_image_id":11},[130],{"id":131,"txt":132,"latitude":11,"longitude":11,"country":133},1727,"Ducarre's Quarry, Beaunant, Chaponost, Lyon, Rhône, Auvergne-Rhône-Alpes, France","France",199,[136,140,144,148,153,157,160,165,170,174,179,183,187,191,195,199,204,208,212,217,222,227,231,235,240],{"id":137,"year":30,"html":138,"doi":139},399098,"Gonnard, Ferdinand (1881) Sur l'existence d'une espèce minérale nouvelle, la Dumortiérite, dans le gneiss de Beaunan, au-dessus des anciens aqueducs gallo-romains de la vallée de l'Izeron (Rhône) \u003Ci>Bulletin de Minéralogie\u003C\u002Fi>,  4 (1) 2-5 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3406\u002Fbulmi.1881.1606'>doi:10.3406\u002Fbulmi.1881.1606\u003C\u002Fa>","10.3406\u002Fbulmi.1881.1606",{"id":141,"year":30,"html":142,"doi":143},399101,"Damour, Augustin-Alexis (1881) Analyse de la Dumortiérite. \u003Ci>Bulletin de Minéralogie\u003C\u002Fi>,  4 (1) 6-8 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3406\u002Fbulmi.1881.1607'>doi:10.3406\u002Fbulmi.1881.1607\u003C\u002Fa>","10.3406\u002Fbulmi.1881.1607",{"id":145,"year":146,"html":147,"doi":11},16108043,1902,"Ford, William Ebenezer (1902) On the chemical composition of dumortierite. American Journal of Science, 4th. Series: 14: 426-430.",{"id":149,"year":150,"html":151,"doi":152},102710,1903,"Ford, W. E. (1903) Ueber die chemische Zusammensetzung des Dumortierit. \u003Ci>Zeitschrift für Kristallographie\u003C\u002Fi>,  37 (1-6). 417-421 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1903.37.1.417'>doi:10.1524\u002Fzkri.1903.37.1.417\u003C\u002Fa>","10.1524\u002Fzkri.1903.37.1.417",{"id":154,"year":155,"html":156,"doi":11},15977434,1905,"Schaller, Waldemar T. (1905) Dumortierite. \u003Ci>Contributions to mineralogy from the United States Geological Survey, Bulletin 262\u003C\u002Fi>, US Geological Survey. p.91-120.",{"id":158,"year":155,"html":159,"doi":11},16108045,"Schaller, Waldemar Theodore (1905) Dumortierite. \u003Ci>American Journal Of Science\u003C\u002Fi>,  S. 4 Vol. 19. 211-224",{"id":161,"year":162,"html":163,"doi":164},102859,1906,"Schaller, W. T. (1906) II. Über Dumortierit. \u003Ci>Zeitschrift für Kristallographie - Crystalline Materials\u003C\u002Fi>,  41 (1). 19-47 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1906.41.1.19'>doi:10.1524\u002Fzkri.1906.41.1.19\u003C\u002Fa>","10.1524\u002Fzkri.1906.41.1.19",{"id":166,"year":167,"html":168,"doi":169},6220716,1928,"Groves, A. W. (1928) The identification of dumortierite as grains; dumortierite in Cornish granite. \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>, 21 (121). 489-492 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1928.021.121.04'>doi:10.1180\u002Fminmag.1928.021.121.04\u003C\u002Fa>","10.1180\u002Fminmag.1928.021.121.04",{"id":171,"year":172,"html":173,"doi":11},16108048,1956,"Losert, J. (1956) Dumortierites from the migmatites and pegmatites in the vicinity of Kutná Hora. Rozpr. ČSAV: 66(1): 1-44. (in Czech with Russian and English abstracts)",{"id":175,"year":176,"html":177,"doi":178},6221378,1958,"Claringbull, G. F., Hey, M. H. (1958) New data for dumortierite. \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>, 31 (242). 901-907 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1958.031.242.02'>doi:10.1180\u002Fminmag.1958.031.242.02\u003C\u002Fa>","10.1180\u002Fminmag.1958.031.242.02",{"id":180,"year":181,"html":182,"doi":11},16108050,1978,"Moore, P.B., Araki, T. (1978) Dumortierite, Si3B[Al6.75_0.25O17.25(OH)0.75]: a detailed structure analysis. Neues Jahrbuch für Mineralogie, Abhandlungen: 132: 231-241.",{"id":184,"year":185,"html":186,"doi":11},16108051,1986,"Alexander, V.D., Griffen, D.T., Martin, T.J. (1986) Crystal chemistry of some Fe- and Ti-poor dumortierites. American Mineralogist: 71: 786-794.",{"id":188,"year":189,"html":190,"doi":11},16108052,1993,"Taner, M.F., Martin, R.F. (1993) Significance of dumortierite in an aluminosilicate-rich alteration zone, Louvicourt, Quebec. The Canadian Mineralogist: 31: 137-146.",{"id":192,"year":193,"html":194,"doi":11},16108053,1995,"Visser, D. (1995) Bibliography of dumortierite. Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen: Biological, Chemical, Geological, Physical and Medical Sciences: 98: 89-105.",{"id":196,"year":197,"html":198,"doi":11},15418311,1996,"Grew, Edward S.; Anovitz, Lawrence M. - \u003Ci>Eds.\u003C\u002Fi> (1996) Boron - Mineralogy, Petrology and Geochemistry. \u003Ci>Reviews in Mineralogy\u003C\u002Fi> Vol. 33. Mineralogical Society of America p.862",{"id":200,"year":201,"html":202,"doi":203},127870,2000,"Platonov, Alexei N., Langer, Klaus, Chopin, Christian, Andrut, Michael, Taran, Michail N. (2000) Fe2+ -Ti4+ charge-transfer in dumortierite. \u003Ci>European Journal of Mineralogy\u003C\u002Fi>,  12 (3) 521-528 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1127\u002Fejm\u002F12\u002F3\u002F0521'>doi:10.1127\u002Fejm\u002F12\u002F3\u002F0521\u003C\u002Fa>","10.1127\u002Fejm\u002F12\u002F3\u002F0521",{"id":205,"year":206,"html":207,"doi":11},16964043,2001,"(2001) Dumortierite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fdumortierite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":209,"year":210,"html":211,"doi":11},16108054,2003,"Cempírek, J. (2003) Mineral assemblages and chemistry of dumortierite from granitic pegmatites. M.S. thesis, Institute of Geological Sciences, Brno, Czech Republic. (in Czech with English abstract)",{"id":213,"year":214,"html":215,"doi":216},128428,2005,"Fuchs, Yves, Ertl, Andreas, Hughes, John M., Prowatke, Stefan, Brandstätter, Franz, Schuster, Ralf (2005) Dumortierite from the Gföhl unit, Lower Austria: chemistry, structure, and infra-red spectroscopy. \u003Ci>European Journal of Mineralogy\u003C\u002Fi>,  17 (1). 173-183 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1127\u002F0935-1221\u002F2005\u002F0017-0173'>doi:10.1127\u002F0935-1221\u002F2005\u002F0017-0173\u003C\u002Fa>","10.1127\u002F0935-1221\u002F2005\u002F0017-0173",{"id":218,"year":219,"html":220,"doi":221},244149,2011,"Pieczka, A., Grew, E. S., Groat, L. A., Evans, R. J. (2011) Holtite and dumortierite from the Szklary Pegmatite, Lower Silesia, Poland. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  75 (2) 303-315 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.2011.075.2.303'>doi:10.1180\u002Fminmag.2011.075.2.303\u003C\u002Fa>","10.1180\u002Fminmag.2011.075.2.303",{"id":223,"year":224,"html":225,"doi":226},396923,2012,"Evans, R. J., Fyfe, C. A., Groat, L. A., Lam, A. E. (2012) MAS NMR measurements and ab initio calculations of the 29Si chemical shifts in dumortierite and holtite. \u003Ci>American Mineralogist\u003C\u002Fi>,  97 (2) 329-340 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam.2012.3880'>doi:10.2138\u002Fam.2012.3880\u003C\u002Fa>","10.2138\u002Fam.2012.3880",{"id":228,"year":224,"html":229,"doi":230},65033,"Groat, L. A., Evans, R. J., Grew, E. S., Pieczka, A. (2012) The Crystal Chemistry of As- and Sb-bearing Dumortierite. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  50 (4) 855-872 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3749\u002Fcanmin.50.4.855'>doi:10.3749\u002Fcanmin.50.4.855\u003C\u002Fa>","10.3749\u002Fcanmin.50.4.855",{"id":232,"year":224,"html":233,"doi":234},65045,"Evans, R. J., Groat, L. A. (2012) Structure and topology of dumortierite and dumortierite-like materials. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  50 (5) 1197-1231 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3749\u002Fcanmin.50.5.1197'>doi:10.3749\u002Fcanmin.50.5.1197\u003C\u002Fa>","10.3749\u002Fcanmin.50.5.1197",{"id":236,"year":237,"html":238,"doi":239},244443,2013,"Pieczka, A., Evans, R. J., Grew, E. S., Groat, L. A., Ma, C., Rossman, G. R. (2013) The dumortierite supergroup. I. A new nomenclature for the dumortierite and holtite groups. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  77 (6) 2825-2839 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.2013.077.6.09'>doi:10.1180\u002Fminmag.2013.077.6.09\u003C\u002Fa>","10.1180\u002Fminmag.2013.077.6.09",{"id":241,"year":242,"html":243,"doi":244},15651678,2023,"Vigier, Maxence, Fritsch, Emmanuel, Cavignac, Théo, Latouche, Camille, Jobic, Stéphane (2023) Shortwave UV Blue Luminescence of Some Minerals and Gems Due to Titanate Groups. \u003Ci>Minerals\u003C\u002Fi>, 13 (1) 104 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3390\u002Fmin13010104'>doi:10.3390\u002Fmin13010104\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Fwww.mdpi.com\u002F2075-163X\u002F13\u002F1\u002F104\u002Fpdf?version=1674017971' class='refpdflink'>\u003C\u002Fa>","10.3390\u002Fmin13010104",[246,256,263,273,280,284,293,297,301,308,317,326,335,340,350,359,364,369,374,383,390,397,404,411,418,425,432,439],{"id":247,"source_url":248,"license_code":249,"credit_html":250,"title":251,"description":252,"author":253,"original_width":254,"original_height":255},7466,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=3181622","CC BY 3.0","Ra'ike (see also: de:Benutzer:Ra'ike), via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=3181622\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-dark.jpg","Dumortierite, Silicon-Mineral","Ra'ike (see also: de:Benutzer:Ra'ike)",2068,1131,{"id":257,"source_url":258,"license_code":259,"credit_html":260,"title":7,"description":11,"author":11,"original_width":261,"original_height":262},29633,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F112660","CC BY 4.0","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F112660\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana",1000,666,{"id":264,"source_url":265,"license_code":266,"credit_html":267,"title":268,"description":269,"author":270,"original_width":271,"original_height":272},52782,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=1046262","CC BY-SA 3.0","No machine-readable author provided. Kluka assumed (based on copyright claims)., via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=1046262\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortieryt, 4Madagaskar.jpg","minerał; dumortieryt; pochodzenie Madagaskar, autor zdjęcia Sebastian Socha; 05.08.2006r.","No machine-readable author provided. Kluka assumed (based on copyright claims).",436,305,{"id":274,"source_url":275,"license_code":249,"credit_html":276,"title":277,"description":252,"author":253,"original_width":278,"original_height":279},7467,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=3181626","Ra'ike (see also: de:Benutzer:Ra'ike), via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=3181626\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-light.jpg",2058,1159,{"id":281,"source_url":282,"license_code":259,"credit_html":283,"title":7,"description":11,"author":11,"original_width":261,"original_height":262},29634,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F113178","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F113178\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana",{"id":285,"source_url":286,"license_code":266,"credit_html":287,"title":288,"description":289,"author":290,"original_width":291,"original_height":292},7468,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10429117","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10429117\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-ch23a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDumortierite\" class=\"extiw\" title=\"en:Dumortierite\">Dumortierite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAlpine_County,_California\" class=\"extiw\" title=\"en:Alpine County, California\">Alpine 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-23842.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 5.7 x 2.7 x 1.1 cm\n\u003Cdl>\u003Cdt>Dumortierite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>Not very attractive, but it is what it is....and is possibly a pseudomorph of dumortierite after tourmaline, in this case. Ex. Chuck Houser Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",570,800,{"id":294,"source_url":295,"license_code":259,"credit_html":296,"title":7,"description":11,"author":11,"original_width":261,"original_height":262},29635,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F112702","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F112702\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana",{"id":298,"source_url":299,"license_code":259,"credit_html":300,"title":7,"description":11,"author":11,"original_width":261,"original_height":262},29636,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F119328","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F119328\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana",{"id":302,"source_url":303,"license_code":259,"credit_html":304,"title":305,"description":11,"author":306,"original_width":307,"original_height":307},29637,"http:\u002F\u002Fwww.pictures-bank.eu\u002Findex.php?action=przegladaj_zdjecie&id=101871","Photo: http:\u002F\u002Fwww.wikidata.org\u002Fentity\u002FQ117309638 — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"http:\u002F\u002Fwww.pictures-bank.eu\u002Findex.php?action=przegladaj_zdjecie&id=101871\" rel=\"noopener\">The International Center for Information Management Systems and Services\u003C\u002Fa> via Europeana","Earrings","http:\u002F\u002Fwww.wikidata.org\u002Fentity\u002FQ117309638",1798,{"id":309,"source_url":310,"license_code":266,"credit_html":311,"title":312,"description":313,"author":314,"original_width":315,"original_height":316},52784,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=5165361","Quatrostein, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=5165361\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortieriet 001.jpg","Dumortieriet (mineraal), ca. 3 cm lang.","Quatrostein",1600,1200,{"id":318,"source_url":319,"license_code":266,"credit_html":320,"title":321,"description":322,"author":323,"original_width":324,"original_height":325},52785,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22168942","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22168942\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortiérite 1.JPG","dumortierite : Beraketa Commune, Bekily District, Androy Region, Tuléar Province (Toliara), Madagascar","Géry PARENT",4288,2848,{"id":327,"source_url":328,"license_code":259,"credit_html":329,"title":330,"description":331,"author":332,"original_width":333,"original_height":334},7473,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=181223242","Marie-Lan Taÿ Pamart, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=181223242\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Azul Macauba dumortierite quartzite Caillois Donation MNHN.jpg","Azul Macauba dumortierite quartzite from the Serra do Espinhaço, Brazil. Exhibition “Stones and Reveries: The Poetry and Minerals of Roger Caillois“ at the School of Jewelry Arts in Paris (November 6th, 2025—29th, 2026). Gallery of Mineralogy and Geology of the French National Museum of Natural History in Paris.","Marie-Lan Taÿ Pamart",3578,5367,{"id":336,"source_url":337,"license_code":266,"credit_html":338,"title":339,"description":322,"author":323,"original_width":324,"original_height":325},52786,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22168943","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22168943\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortiérite.JPG",{"id":341,"source_url":342,"license_code":343,"credit_html":344,"title":345,"description":346,"author":347,"original_width":348,"original_height":349},52787,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84716574","CC BY 2.0","Stephanie Clifford from Arlington, VA, USA, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84716574\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite - Blue (2932215927).jpg","Dumortierite - Blue","Stephanie Clifford from Arlington, VA, USA",538,454,{"id":351,"source_url":352,"license_code":353,"credit_html":354,"title":355,"description":356,"author":357,"original_width":358,"original_height":325},52790,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=157232918","CC BY-SA 4.0","J. Patrick Fischer, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=157232918\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","53956 Dumortierit Feldspat 3.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDumortierite\" class=\"extiw\" title=\"en:Dumortierite\">Dumortierite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFeldspar\" class=\"extiw\" title=\"en:Feldspar\">Feldspar\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Weight: 992.3 g\u003C\u002Fdd>\n\u003Cdd>Locality: Ratsbruch, Hartmannsdorf, Chemnitz, Saxony, Germany\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","J. Patrick Fischer",4272,{"id":360,"source_url":361,"license_code":353,"credit_html":362,"title":363,"description":356,"author":357,"original_width":358,"original_height":325},52791,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=157232919","J. Patrick Fischer, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=157232919\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","53956 Dumortierit Feldspat 1.jpg",{"id":365,"source_url":366,"license_code":353,"credit_html":367,"title":368,"description":356,"author":357,"original_width":358,"original_height":325},52792,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=157232922","J. Patrick Fischer, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=157232922\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","53956 Dumortierit Feldspat 4.jpg",{"id":370,"source_url":371,"license_code":353,"credit_html":372,"title":373,"description":356,"author":357,"original_width":358,"original_height":325},52793,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=157232923","J. Patrick Fischer, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=157232923\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","53956 Dumortierit Feldspat 5.jpg",{"id":375,"source_url":376,"license_code":343,"credit_html":377,"title":378,"description":379,"author":380,"original_width":381,"original_height":382},7470,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716308","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716308\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-quartz (Brazil) 3.jpg","A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties.  At its simplest, a mineral is a naturally-occurring solid chemical.  Currently, there are over 5700 named and described minerals - about 200 of them are common and about 20 of them are very common.  Mineral classification is based on anion chemistry.  Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.\n\u003Cp>The silicates are the most abundant and chemically complex group of minerals.  All silicates have silica as the basis for their chemistry.  \"Silica\" refers to SiO2 chemistry.  The fundamental molecular unit of silica is one small silicon atom surrounded by four large oxygen atoms in the shape of a triangular pyramid - this is the silica tetrahedron - SiO4.  Each oxygen atom is shared by two silicon atoms, so only half of the four oxygens \"belong\" to each silicon.  The resulting formula for silica is thus SiO2, not SiO4.\n\u003C\u002Fp>\u003Cp>Dumortierite is a scarce silicate mineral having the formula (Al,Fe)7(SiO4)3(BO3)O3 - aluminum iron borosilicate.  It is often bluish, but can be other colors (greenish, purplish, pinkish, reddish).  Dumortierite is fairly hard (H=7 to 8 on the Mohs Hardness Scale).\n\u003C\u002Fp>\u003Cp>Seen here is a dumortierite-quartz specimen from the Precambrian of Brazil.  It comes from an area having dumortierite-bearing quartzites (= metamorphosed sandstones) that are quarried, cut, and polished as decorative stones (\"Azul Macaubas\").\n\u003C\u002Fp>\u003Cp>Locality: unrecorded\u002Fundisclosed site in Brazil (but probably from or near the Vaca Morta Quarry, southwest of Boquira, Bahia State, eastern Brazil)\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Photo gallery of dumortierite:\n\u003C\u002Fp>\nwww.mindat.org\u002Fgallery.php?min=1329","James St. John",1719,1258,{"id":384,"source_url":385,"license_code":343,"credit_html":386,"title":387,"description":379,"author":380,"original_width":388,"original_height":389},7471,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716311","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716311\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-quartz (Brazil) 1.jpg",1633,1655,{"id":391,"source_url":392,"license_code":343,"credit_html":393,"title":394,"description":379,"author":380,"original_width":395,"original_height":396},7472,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716312","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716312\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-quartz (Brazil) 4.jpg",1252,1804,{"id":398,"source_url":399,"license_code":343,"credit_html":400,"title":401,"description":379,"author":380,"original_width":402,"original_height":403},7474,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716310","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716310\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-quartz (Brazil) 2.jpg",1614,1698,{"id":405,"source_url":406,"license_code":343,"credit_html":407,"title":408,"description":379,"author":380,"original_width":409,"original_height":410},52788,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716313","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716313\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-quartz (Brazil) 5.jpg",2175,1036,{"id":412,"source_url":413,"license_code":343,"credit_html":414,"title":415,"description":379,"author":380,"original_width":416,"original_height":417},7475,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716315","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716315\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-quartz (Brazil) 6.jpg",2119,1387,{"id":419,"source_url":420,"license_code":343,"credit_html":421,"title":422,"description":379,"author":380,"original_width":423,"original_height":424},7476,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716316","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716316\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-quartz (Brazil) 9.jpg",1670,1626,{"id":426,"source_url":427,"license_code":343,"credit_html":428,"title":429,"description":379,"author":380,"original_width":430,"original_height":431},7477,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716317","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716317\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-quartz (Brazil) 8.jpg",1542,1643,{"id":433,"source_url":434,"license_code":343,"credit_html":435,"title":436,"description":379,"author":380,"original_width":437,"original_height":438},7478,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716318","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716318\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-quartz (Brazil) 7.jpg",1661,1282,{"id":440,"source_url":441,"license_code":343,"credit_html":442,"title":443,"description":379,"author":380,"original_width":444,"original_height":445},52789,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716320","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113716320\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Dumortierite-quartz (Brazil) 10.jpg",1658,1569,[447,453,458,463,468],{"id":448,"url":449,"label":450,"formula":451,"spacegroup":452,"year":224},3964,"\u002Fcif\u002F3964.cif","Groat 2012 · Al6.81 Si2.884 As.093 Sb.023 B O17.884","Al6.81 Si2.884 As.093 Sb.023 B O17.884","P n m a",{"id":454,"url":455,"label":456,"formula":457,"spacegroup":452,"year":224},3965,"\u002Fcif\u002F3965.cif","Groat 2012 · Al6.668 Si2.89 As.087 Sb.022 B O17.898","Al6.668 Si2.89 As.087 Sb.022 B O17.898",{"id":459,"url":460,"label":461,"formula":462,"spacegroup":452,"year":224},3966,"\u002Fcif\u002F3966.cif","Groat 2012 · Al6.809 Si2.876 As.099 Sb.025 B O17.876","Al6.809 Si2.876 As.099 Sb.025 B O17.876",{"id":464,"url":465,"label":466,"formula":467,"spacegroup":452,"year":224},3967,"\u002Fcif\u002F3967.cif","Groat 2012 · Al6.79 Si3 B O18","Al6.79 Si3 B O18",{"id":469,"url":470,"label":471,"formula":472,"spacegroup":452,"year":224},3968,"\u002Fcif\u002F3968.cif","Evans 2012","Al6.692 Si2.943 B O18",[],[475,479,483,486,490,494,497,501,504,508,512,516,520,524,528,532,535,539,542,545,549,553,556,560,564,568],{"lang":476,"names":477},"ca",[478],"dumortierita",{"lang":480,"names":481},"cs",[482],"Dumortierit",{"lang":484,"names":485},"de",[482],{"lang":487,"names":488},"es",[489],"Dumortierita",{"lang":491,"names":492},"et",[493],"dümortieriit",{"lang":495,"names":496},"eu",[489],{"lang":498,"names":499},"fa",[500],"دومورتیریت",{"lang":502,"names":503},"fr",[7],{"lang":505,"names":506},"he",[507],"דיומורטיריט",{"lang":509,"names":510},"hy",[511],"Դյումորտյերիտ",{"lang":513,"names":514},"it",[515],"dumortierite",{"lang":517,"names":518},"ja",[519],"デュモルチェライト",{"lang":521,"names":522},"lt",[523],"Dumortieritas",{"lang":525,"names":526},"nb",[527],"dumortieritt",{"lang":529,"names":530},"nl",[531],"dumortieriet",{"lang":533,"names":534},"nn",[527],{"lang":536,"names":537},"pl",[538],"Dumortieryt",{"lang":540,"names":541},"pt",[489,515],{"lang":543,"names":544},"pt-br",[478,515],{"lang":546,"names":547},"ro",[548],"dumortierit",{"lang":550,"names":551},"ru",[552],"Дюмортьерит",{"lang":554,"names":555},"sl",[7],{"lang":557,"names":558},"uk",[559],"Дюмортьєрит",{"lang":561,"names":562},"zh",[563],"蓝线石",{"lang":565,"names":566},"zh-hant",[567],"藍線石",{"lang":569,"names":570},"zh-tw",[567],"Q677619",{"history":11,"applications":11}]