[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:1128":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":15,"elements":17,"sigelements":22,"key_elements":11,"impurities":23,"cim":24,"ima_status":25,"ima_notes":11,"ima_history":11,"approval_year":11,"publication_year":11,"discovery_year":28,"strunz10ed1":29,"strunz10ed2":30,"strunz10ed3":31,"strunz10ed4":32,"dana8ed1":33,"dana8ed2":34,"dana8ed3":35,"dana8ed4":35,"csystem":36,"cclass":37,"spacegroup":38,"spacegroupset":39,"a":40,"b":41,"c":42,"alpha":43,"beta":43,"gamma":43,"aerror":44,"berror":45,"cerror":45,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":11,"z":46,"csmetamict":14,"commentcrystal":11,"twinning":47,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":48,"tlform":11,"hmin":49,"hmax":50,"hardtype":11,"vhnmin":43,"vhnmax":43,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":51,"dmeas2":52,"dcalc":53,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":54,"lustretype":55,"commentluster":11,"diapheny":56,"streak":11,"colour":57,"commentcolor":58,"colors":59,"streak_colors":11,"luminescence":11,"uv":11,"cleavage":67,"cleavagetype":68,"fracturetype":69,"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":43,"opticalomega2":43,"opticalomegaerror":11,"opticalepsilon":43,"opticalepsilon2":43,"opticalepsilonerror":11,"opticaln":43,"opticaln2":43,"opticalnerror":11,"optical2vcalc":79,"optical2vcalc2":80,"optical2vcalcerror":11,"optical2vmeasured":81,"optical2vmeasured2":82,"optical2vmeasurederror":11,"rimin":83,"rimax":84,"opticaldispersion":85,"opticalpleochroism":86,"opticalpleochorismdesc":87,"opticalbirefringence":11,"opticalcomments":88,"opticalcolour":11,"opticalinternal":11,"opticaltropic":11,"opticalanisotropism":11,"opticalbireflectance":11,"opticalextinction":89,"opticalr":11,"specdispm":11,"ir":11,"electrical":11,"magnetism":11,"thermalbehaviour":11,"other":11,"industrial":11,"occurrence":11,"otheroccurrence":90,"type_specimen_store":11,"description_short":91,"aboutname":92,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":93,"reviewed_at":11,"variety_of":11,"varieties":94,"group_members":100,"associates":128,"confused_with":213,"type_localities":215,"occurrence_total":222,"citations":223,"images":481,"structures":792,"synonyms":820,"language_names":844,"wikidata_qid":1044,"texts":1045},1128,"1:1:1128:6","a904bec8-4088-4c10-9192-e179c9778aef","Cordierite","Crd",0,"mineral",null,494681,5950,false,"Mg\u003Csub>2\u003C\u002Fsub>Al\u003Csub>4\u003C\u002Fsub>Si\u003Csub>5\u003C\u002Fsub>O\u003Csub>18\u003C\u002Fsub>","Also given as (Mg,Fe)\u003Csub>2\u003C\u002Fsub>Al\u003Csub>3\u003C\u002Fsub>(AlSi\u003Csub>5\u003C\u002Fsub>O\u003Csub>18\u003C\u002Fsub>)\u003Csup>.\u003C\u002Fsup>n(H\u003Csub>2\u003C\u002Fsub>O,CO\u003Csub>2\u003C\u002Fsub>,Na\u003Csup>+\u003C\u002Fsup>,K\u003Csup>+\u003C\u002Fsup>);\r\nX\u003Csub>0-1\u003C\u002Fsub>(Mg,Fe,Li)\u003Csub>2\u003C\u002Fsub>(Al,Si,Be)\u003Csub>9\u003C\u002Fsub>O\u003Csub>18\u003C\u002Fsub> (X = H\u003Csub>2\u003C\u002Fsub>O, CO\u003Csub>2\u003C\u002Fsub>, Ar, Xe, Na, K); (Mg,Fe)\u003Csub>2\u003C\u002Fsub>Al\u003Csub>3\u003C\u002Fsub>(AlSi\u003Csub>5\u003C\u002Fsub>O\u003Csub>18\u003C\u002Fsub>)\u003Csup>.\u003C\u002Fsup>\u003Csup>[Ch]\u003C\u002Fsup>X",[18,19,20,21],"Al","Mg","Si","O",[18,19,20,21],",Mn,Fe,Ti,Ca,Na,K,,","16.19.2",[26,27],"APPROVED","GRANDFATHERED","1813","9","C","J","10","61","2","1","Orthorhombic",8,48,"Cccm ","17.079","9.730","9.356","0",3,2,4,"Common on {110} and {130}, simple, lamellar, and cyclical.","Crystals short prismatic, striated parallel to [001]. Commonly granular to compact, massive.",7,7.5,"2.6","2.66","2.505","Vitreous to glassy","Vitreous","Transparent,Translucent","Grey, blue, blue-violet, greenish, yellowish brown; colourless to very light blue in transmitted light.","Charles and others have explained the coloration mechanism of cordierite, stating that its blue color originates from the charge transfer between Fe2+ in the octahedral sites and Fe3+ in the T11 tetrahedral sites. Dudka et al. conducted precise X-ray diffraction analysis on cordierite, identifying the locations of metal cations Na+, H2O, and CO2 within the channels of cordierite. Pollak explained the sites of charge transfer in cordierite by examining the differences between infrared absorption bands along different crystallographic axes, providing a deeper explanation for its polychroism. However, specific studies on the spectral differences between different crystal axes are lacking. Duncan et al. measured the Mössbauer spectra of cordierite single crystals in different directions, determining the positions and occupancy rates of Fe2+ and Fe3+ ions, suggesting that the exchange interaction between Fe3+ ions on the T1 sites and the six-fold sites is the source of cordierite’s polychroism. Raphaël et al. evaluated the spectroscopic properties of cordierite through TD-DFT, assessing the simulation of polychroism and the variation of color with different light sources. However, studies on the spectral differences along different crystallographic axes of cordierite and the content ratio of Fe2+ to Fe3+ are still lacking.\r\nThe sample’s refractive index and relative density are lower compared to iron cordierite, with an XMg range between 0.79 and 0.96. The Raman spectral characteristics are closer to those of pure Mg-cordierite, indicating that the samples are Mg-cordierite. The cordierite samples contain both Fe2+ and Fe3+ valence states, with an average ratio of 25.55% to 74.45%. The ultraviolet spectral characteristics of cordierite indicate that the difference in the broad absorption band at 584 nm is the key to cordierite’s strong pleochroism (deep purple\u002Flight purple\u002Flight yellow), caused by charge transfer between Fe2+ in the octahedron and Fe3+ in the tetrahedron. Infrared and Raman spectroscopy results reveal that differences in the Si-O group density in different directions cause variations in the spectral characteristics among the three optical principal axis directions of cordierite, with the greatest difference along the parallel b-axis, while the spectral characteristics of the other two directions are similar. Both infrared and Raman spectroscopy also prove the presence of a certain amount of Type I H2O and a small amount of Type II H2O in Mg-cordierite, with the band intensity of Type II H2O being directly proportional to the sample’s Na content.[[1]]",[60,61,62,63,64,65,66],"blue","gray","purple","green","yellow","brown","colorless","On {100}, fair; On {001} and {010}, poor.","Imperfect\u002FFair","Sub-Conchoidal","brittle","Biaxial","-","1.527","1.56","1.532","1.574","1.538","1.578","54","86","75","89",1.527,1.578,"r \u003C v, weak to marked","Strong","X = Pale yellow, green; Y = Violet, blue-violet; Z = Light blue.","Absorption: Z > Y > X.","X = c; Y = a; Z = b.","Thermally metamorphosed argillaceous sedimentary rocks; high-grade regionally metamorphosed schists, gneisses, and granulites; also in mafic igneous rocks and granites.","The Mg analogue of sekaninaite. Cordierite-Sekaninaite Series.\r\n\r\nThe hexagonal high-temperature dimorph of cordierite is indialite.\r\n\r\nCordierite is a high- to ultra-high-temperature species.\r\n\r\nIt is often found altered to pinite.\r\n\r\nMay be confused ...","After Pierre Louis Antoine Cordier (Abbeville, France 31 March 1777 - Paris, France 30 March 1861), French mining engineer and geologist, who first studied this species. He founded microscopic mineralogy and was head of the Muséum national d'histoire naturelle.","2025-12-19 20:33:08",[95],{"id":96,"name":97,"entrytype":45,"csystem":11,"ima_formula":11,"mindat_formula":98,"hmin":11,"hmax":11,"dmeas":11,"dcalc":11,"primary_image_id":99},5119,"Iolite","(Mg,Fe)\u003Csub>2\u003C\u002Fsub>Al\u003Csub>3\u003C\u002Fsub>(AlSi\u003Csub>5\u003C\u002Fsub>O\u003Csub>18\u003C\u002Fsub>)",50711,[101,108,116,121],{"id":102,"name":103,"entrytype":9,"csystem":104,"ima_formula":105,"mindat_formula":105,"hmin":49,"hmax":49,"dmeas":52,"dcalc":106,"primary_image_id":107},43879,"Ferroindialite","Hexagonal","(Fe\u003Csup>2+\u003C\u002Fsup>,Mg)\u003Csub>2\u003C\u002Fsub>Al\u003Csub>4\u003C\u002Fsub>Si\u003Csub>5\u003C\u002Fsub>O\u003Csub>18\u003C\u002Fsub>","2.667",8795,{"id":109,"name":110,"entrytype":9,"csystem":104,"ima_formula":111,"mindat_formula":112,"hmin":49,"hmax":50,"dmeas":113,"dcalc":114,"primary_image_id":115},2026,"Indialite","Mg\u003Csub>2\u003C\u002Fsub>Al\u003Csub>3\u003C\u002Fsub>(AlSi\u003Csub>5\u003C\u002Fsub>)O\u003Csub>18\u003C\u002Fsub>","Mg\u003Csub>2\u003C\u002Fsub>Al\u003Csub>3\u003C\u002Fsub>(AlSi\u003Csub>5\u003C\u002Fsub>O\u003Csub>18\u003C\u002Fsub>)","2.512","2.59",60721,{"id":117,"name":118,"entrytype":9,"csystem":36,"ima_formula":119,"mindat_formula":120,"hmin":11,"hmax":11,"dmeas":11,"dcalc":11,"primary_image_id":11},470681,"Sachanbińskiite","NaMn\u003Csub>4\u003C\u002Fsub>(Al\u003Csub>5\u003C\u002Fsub>Be)(AlSi\u003Csub>5\u003C\u002Fsub>O\u003Csub>18\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub> · 2H\u003Csub>2\u003C\u002Fsub>O","NaMn\u003Csub>4\u003C\u002Fsub>(Al\u003Csub>5\u003C\u002Fsub>Be)(AlSi\u003Csub>5\u003C\u002Fsub>O\u003Csub>18\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>·2H\u003Csub>2\u003C\u002Fsub>O",{"id":122,"name":123,"entrytype":9,"csystem":36,"ima_formula":124,"mindat_formula":124,"hmin":49,"hmax":50,"dmeas":125,"dcalc":126,"primary_image_id":127},3609,"Sekaninaite","Fe\u003Csup>2+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>Al\u003Csub>4\u003C\u002Fsub>Si\u003Csub>5\u003C\u002Fsub>O\u003Csub>18\u003C\u002Fsub>","2.76","2.78",78846,[129,137,146,156,165,173,181,182,190,200,206],{"id":130,"name":131,"entrytype":9,"csystem":132,"ima_formula":133,"mindat_formula":133,"hmin":49,"hmax":50,"dmeas":134,"dcalc":135,"primary_image_id":136},452,"Almandine","Isometric","Fe\u003Csup>2+\u003C\u002Fsup>\u003Csub>3\u003C\u002Fsub>Al\u003Csub>2\u003C\u002Fsub>(SiO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>","4.318","4.313",848,{"id":138,"name":139,"entrytype":9,"csystem":36,"ima_formula":140,"mindat_formula":141,"hmin":142,"hmax":50,"dmeas":143,"dcalc":144,"primary_image_id":145},217,"Andalusite","Al\u003Csub>2\u003C\u002Fsub>SiO\u003Csub>5\u003C\u002Fsub>","Al\u003Csub>2\u003C\u002Fsub>(SiO\u003Csub>4\u003C\u002Fsub>)O",6.5,"3.13","3.149",29089,{"id":147,"name":148,"entrytype":9,"csystem":36,"ima_formula":149,"mindat_formula":150,"hmin":151,"hmax":152,"dmeas":153,"dcalc":154,"primary_image_id":155},254,"Anthophyllite","◻Mg\u003Csub>2\u003C\u002Fsub>Mg\u003Csub>5\u003C\u002Fsub>Si\u003Csub>8\u003C\u002Fsub>O\u003Csub>22\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>","◻Mg\u003Csub>2\u003C\u002Fsub>Mg\u003Csub>5\u003C\u002Fsub>(Si\u003Csub>8\u003C\u002Fsub>O\u003Csub>22\u003C\u002Fsub>)(OH)\u003Csub>2\u003C\u002Fsub>",5.5,6,"2.85","3.67",1546,{"id":157,"name":158,"entrytype":9,"csystem":159,"ima_formula":160,"mindat_formula":160,"hmin":161,"hmax":161,"dmeas":162,"dcalc":163,"primary_image_id":164},1136,"Corundum","Trigonal","Al\u003Csub>2\u003C\u002Fsub>O\u003Csub>3\u003C\u002Fsub>",9,"3.98","3.997",6346,{"id":166,"name":167,"entrytype":9,"csystem":36,"ima_formula":168,"mindat_formula":169,"hmin":151,"hmax":152,"dmeas":170,"dcalc":171,"primary_image_id":172},1665,"Gedrite","◻Mg\u003Csub>2\u003C\u002Fsub>(Mg\u003Csub>3\u003C\u002Fsub>Al\u003Csub>2\u003C\u002Fsub>)(Si\u003Csub>6\u003C\u002Fsub>Al\u003Csub>2\u003C\u002Fsub>)O\u003Csub>22\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>","◻Mg\u003Csub>2\u003C\u002Fsub>(Mg\u003Csub>3\u003C\u002Fsub>Al\u003Csub>2\u003C\u002Fsub>)(Al\u003Csub>2\u003C\u002Fsub>Si\u003Csub>6\u003C\u002Fsub>O\u003Csub>22\u003C\u002Fsub>)(OH)\u003Csub>2\u003C\u002Fsub>","3.15","3.25",29747,{"id":174,"name":175,"entrytype":9,"csystem":36,"ima_formula":176,"mindat_formula":177,"hmin":50,"hmax":50,"dmeas":178,"dcalc":179,"primary_image_id":180},1737,"Grandidierite","MgAl\u003Csub>3\u003C\u002Fsub>O\u003Csub>2\u003C\u002Fsub>(BO\u003Csub>3\u003C\u002Fsub>)(SiO\u003Csub>4\u003C\u002Fsub>)","(Mg,Fe\u003Csup>2+\u003C\u002Fsup>)(Al,Fe\u003Csup>3+\u003C\u002Fsup>)\u003Csub>3\u003C\u002Fsub>(SiO\u003Csub>4\u003C\u002Fsub>)(BO\u003Csub>3\u003C\u002Fsub>)O\u003Csub>2\u003C\u002Fsub>","2.98","3.00",10338,{"id":109,"name":110,"entrytype":9,"csystem":104,"ima_formula":111,"mindat_formula":112,"hmin":49,"hmax":50,"dmeas":113,"dcalc":114,"primary_image_id":115},{"id":183,"name":184,"entrytype":9,"csystem":36,"ima_formula":185,"mindat_formula":186,"hmin":152,"hmax":49,"dmeas":187,"dcalc":188,"primary_image_id":189},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)","3.29","3.288",13557,{"id":191,"name":192,"entrytype":9,"csystem":193,"ima_formula":194,"mindat_formula":195,"hmin":196,"hmax":196,"dmeas":197,"dcalc":198,"primary_image_id":199},2815,"Muscovite","Monoclinic","KAl\u003Csub>2\u003C\u002Fsub>(Si\u003Csub>3\u003C\u002Fsub>Al)O\u003Csub>10\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>","KAl\u003Csub>2\u003C\u002Fsub>(AlSi\u003Csub>3\u003C\u002Fsub>O\u003Csub>10\u003C\u002Fsub>)(OH)\u003Csub>2\u003C\u002Fsub>",2.5,"2.77","2.83",30243,{"id":201,"name":202,"entrytype":9,"csystem":36,"ima_formula":140,"mindat_formula":141,"hmin":142,"hmax":50,"dmeas":203,"dcalc":204,"primary_image_id":205},3662,"Sillimanite","3.23","3.24",30699,{"id":207,"name":208,"entrytype":9,"csystem":132,"ima_formula":209,"mindat_formula":209,"hmin":50,"hmax":37,"dmeas":210,"dcalc":211,"primary_image_id":212},3729,"Spinel","MgAl\u003Csub>2\u003C\u002Fsub>O\u003Csub>4\u003C\u002Fsub>","3.6","3.578",80269,[214],{"id":109,"name":110,"entrytype":9,"csystem":104,"ima_formula":111,"mindat_formula":112,"hmin":49,"hmax":50,"dmeas":113,"dcalc":114,"primary_image_id":115},[216],{"id":217,"txt":218,"latitude":219,"longitude":220,"country":221},15017,"Großer Arber, Bayerisch Eisenstein, Regen District, Lower Bavaria, Bavaria, Germany",49.1125,13.1352778,"Germany",1016,[224,228,232,236,240,244,248,252,257,262,267,271,275,280,285,289,293,297,301,306,311,316,321,326,331,335,339,342,347,351,355,359,364,368,371,375,379,382,387,391,395,400,404,408,412,416,420,424,428,432,436,440,444,449,454,458,463,466,471,476],{"id":225,"year":226,"html":227,"doi":11},520094,1933,"Rutherford, Ralph L. (1933) Optically positive cordierite from the Northwest Territories, Canada. \u003Ci>American Mineralogist\u003C\u002Fi>,  18 (5) 216 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM18\u002FAM18_216.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":229,"year":230,"html":231,"doi":11},520326,1935,"Conant, L. C. (1935) Optically positive cordierite from New Hampshire. \u003Ci>American Mineralogist\u003C\u002Fi>,  20 (4) 310 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM20\u002FAM20_310.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":233,"year":234,"html":235,"doi":11},520488,1936,"Rutherford, Ralph L. (1936) Optically positive cordierite in the Kisseyenew gneiss at Sherridon, Manitoba. \u003Ci>American Mineralogist\u003C\u002Fi>,  21 (6) 386-387 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM21\u002FAM21_386.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":237,"year":238,"html":239,"doi":11},521163,1941,"Folinsbee, Robert E. (1941) Optic properties of cordierite in relation to alkalies in the cordierite-beryl structure. \u003Ci>American Mineralogist\u003C\u002Fi>,  26 (8) 485-500 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM26\u002FAM26_485.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":241,"year":242,"html":243,"doi":11},521367,1943,"Shand, S. J. (1943) Notes on cordierite: (A) Cordierite crystals from a glass furnace; (B) Cordierite from Horns Nek, Transvaal. \u003Ci>American Mineralogist\u003C\u002Fi>,  28 (6) 391-395 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM28\u002FAM28_391.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":245,"year":246,"html":247,"doi":11},522283,1952,"Venkatesh, V. (1952) Development and growth of cordierite in para-lavas. \u003Ci>American Mineralogist\u003C\u002Fi>,  37 (9-10) 831-848 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM37\u002FAM37_831.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":249,"year":250,"html":251,"doi":11},522530,1954,"Venkatesh, V. (1954) Twinning in cordierite. \u003Ci>American Mineralogist\u003C\u002Fi>,  39 (7-8) 636-646 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM39\u002FAM39_636.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":253,"year":254,"html":255,"doi":256},1155580,1955,"Miyashiro, A., Iiyama, T., Miyashiro, T., Yamasaki, M. (1955) The polymorphism of cordierite and indialite. \u003Ci>American Journal of Science\u003C\u002Fi>,  253 (4) 185-208 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2475\u002Fajs.253.4.185'>doi:10.2475\u002Fajs.253.4.185\u003C\u002Fa>","10.2475\u002Fajs.253.4.185",{"id":258,"year":259,"html":260,"doi":261},1155780,1957,"Miyashiro, A. (1957) Cordierite-indialite relations. \u003Ci>American Journal of Science\u003C\u002Fi>,  255 (1) 43-62 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2475\u002Fajs.255.1.43'>doi:10.2475\u002Fajs.255.1.43\u003C\u002Fa>","10.2475\u002Fajs.255.1.43",{"id":263,"year":264,"html":265,"doi":266},5692,1962,"Smith, J. V., Schreyer, W. (1962) Location of argon and water in cordierite. \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>,  33 (258) 226-236 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1962.033.258.05'>doi:10.1180\u002Fminmag.1962.033.258.05\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_33\u002F33-258-226.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1962.033.258.05",{"id":268,"year":269,"html":270,"doi":11},524545,1966,"Gibbs, G. V. (1966) The polymorphism of cordierite I: The crystal structure of low cordierite. \u003Ci>American Mineralogist\u003C\u002Fi>,  51 (7) 1068-1087 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM51\u002FAM51_1068.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":272,"year":273,"html":274,"doi":11},525254,1969,"Langer, K.; Schreyer, W. (1969) Infrared and powder X-ray diffraction studies on the polymorphism of cordierite Mg2(Al4Si5O18). \u003Ci>American Mineralogist\u003C\u002Fi>,  54 (9-10). 1442-1459 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM54\u002FAM54_1442.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":276,"year":277,"html":278,"doi":279},73428,1970,"Seifert, F.; Schreyer, W. 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(2014) Cordierite formation during the experimental reaction of plagioclase with Mg-rich aqueous solutions. \u003Ci>Contributions to Mineralogy and Petrology\u003C\u002Fi>,  168 (3). 1-13 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fs00410-014-1063-x'>doi:10.1007\u002Fs00410-014-1063-x\u003C\u002Fa>","10.1007\u002Fs00410-014-1063-x",{"id":455,"year":451,"html":456,"doi":457},153948,"Miletich, R., Scheidl, K. S., Schmitt, M., Moissl, A. P., Pippinger, T., Gatta, G. D., Schuster, B., Trautmann, C. (2014) Static elasticity of cordierite I: Effect of heavy ion irradiation on the compressibility of hydrous cordierite. \u003Ci>Physics and Chemistry of Minerals\u003C\u002Fi>,  41 (8) 579-591 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fs00269-014-0671-3'>doi:10.1007\u002Fs00269-014-0671-3\u003C\u002Fa>","10.1007\u002Fs00269-014-0671-3",{"id":459,"year":460,"html":461,"doi":462},397932,2016,"Bebout, Gray E., Lazzeri, Kris E., Geiger, Charles A. (2016) Pathways for nitrogen cycling in Earth’s crust and upper mantle: A review and new results for microporous beryl and cordierite. \u003Ci>American Mineralogist\u003C\u002Fi>,  101 (1) 7-24 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam-2016-5363'>doi:10.2138\u002Fam-2016-5363\u003C\u002Fa>","10.2138\u002Fam-2016-5363",{"id":464,"year":460,"html":465,"doi":11},16106512,"Zwaan, J.C., Pezzotta, F., Rossman, G.R. (2016) Orange-red to yellowish brown cordierite from Madagascar. The Journal of Gemmology 35, 8-9.",{"id":467,"year":468,"html":469,"doi":470},4674536,2017,"Bruno, Giovanni, Vogel, Sven C. (2017) Simultaneous determination of high-temperature crystal structure and texture of synthetic porous cordierite. \u003Ci>Journal of Applied Crystallography\u003C\u002Fi>, 50 (3). 749-762 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1107\u002Fs160057671700406x'>doi:10.1107\u002Fs160057671700406x\u003C\u002Fa>","10.1107\u002Fs160057671700406x",{"id":472,"year":473,"html":474,"doi":475},15781233,2023,"de Roever, Emond W. F.; Harley, Simon L.; Huizenga, Jan M. (2023) Primary cordierite with > 2.5 wt% CO2 from the UHT Bakhuis Granulite Belt, Surinam: CO2 fluid phase saturation during ultrahigh-temperature metamorphism. \u003Ci>Contributions to Mineralogy and Petrology\u003C\u002Fi>,  178 (4). 26 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fs00410-023-02003-1'>doi:10.1007\u002Fs00410-023-02003-1\u003C\u002Fa>","10.1007\u002Fs00410-023-02003-1",{"id":477,"year":478,"html":479,"doi":480},17487457,2024,"Yan, Wenjie; Zhou, Zhiyi; Rao, Yinghua; Guo, Qingfeng (2024) Gemological Characteristics of Blue-Violet Cordierite. \u003Ci>Crystals\u003C\u002Fi>,  14 (7). 637 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3390\u002Fcryst14070637'>doi:10.3390\u002Fcryst14070637\u003C\u002Fa>","10.3390\u002Fcryst14070637",[482,492,499,509,519,528,537,545,554,563,572,580,589,597,606,614,621,630,638,646,651,660,669,676,684,693,701,708,715,725,730,735,740,746,751,756,765,773,781,787],{"id":483,"source_url":484,"license_code":485,"credit_html":486,"title":487,"description":488,"author":489,"original_width":490,"original_height":491},6260,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=31448811","CC BY 3.0","John Sobolewski (JSS), via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=31448811\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierite-383424.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"en:Cordierite\">Cordierite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Tranomaro-Maromby area, Amboasary District, Anosy Region (Fort Dauphin Region), Tuléar Province (Toliara), Madagascar\u003C\u002Fdd>\n\u003Cdd>\u003Ci>Original description:\u003C\u002Fi> A 4.1 by 2.6 cms partially transparent mass with strong pleochroism (see child photo for color change along a different axis). JSS specimen and photo.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","John Sobolewski (JSS)",1024,768,{"id":493,"source_url":494,"license_code":495,"credit_html":496,"title":7,"description":11,"author":11,"original_width":497,"original_height":498},29530,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F127870","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\u002F127870\" rel=\"noopener\">University of Tartu, Natural History Museum\u003C\u002Fa> via Europeana",1000,881,{"id":500,"source_url":501,"license_code":502,"credit_html":503,"title":504,"description":505,"author":506,"original_width":507,"original_height":508},50710,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10476403","CC BY-SA 3.0","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10476403\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierite-usa05c.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"en:Cordierite\">Cordierite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRichmond\" class=\"extiw\" title=\"en:Richmond\">Richmond\u003C\u002Fa>, Cheshire County, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNew_Hampshire\" class=\"extiw\" title=\"en:New Hampshire\">New Hampshire\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-24372.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: cabinet, 12.1 x 8.2 x 4.6 cm\n\u003Cdl>\u003Cdt>Cordierite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A major, huge cordierite crystal cluster from this classic old locality. More importantly, its actually fairly attractive, so far as they go! Ex Warren Johansson collection, with a label dated 1943. Although not the most favorite mineral of most folks, I do think this is one of the better specimens in the update.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",379,400,{"id":510,"source_url":511,"license_code":512,"credit_html":513,"title":514,"description":515,"author":516,"original_width":517,"original_height":518},6256,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10555623","Public domain","Mauswiesel, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10555623\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierite2.JPG","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPleochroism\" class=\"extiw\" title=\"en:Pleochroism\">Pleochroism\u003C\u002Fa> of \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"en:Cordierite\">cordierite\u003C\u002Fa> illustrated by rotating a linear polarizer on the lens of the camera.","Mauswiesel",338,262,{"id":520,"source_url":521,"license_code":502,"credit_html":522,"title":523,"description":524,"author":525,"original_width":526,"original_height":527},6257,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13322921","Didier Descouens, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=13322921\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierite pléochroïsme.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002Fpleochroism\" class=\"extiw\" title=\"en:pleochroism\">pleochroism\u003C\u002Fa> of \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"en:Cordierite\">Cordierite \u003C\u002Fa>-  Same specimen. Left image in polarized light.\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality : Coimbatore District, Chennai (Madras), Tamil Nadu, India\u003C\u002Fdd>\n\u003Cdd>Size: 1.38 x 1.01 x 0.57  - 5.10cts\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Didier Descouens",9587,3856,{"id":529,"source_url":530,"license_code":502,"credit_html":531,"title":532,"description":533,"author":534,"original_width":535,"original_height":536},50702,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=429574","No machine-readable author provided. Vzb83~commonswiki assumed (based on copyright claims)., via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=429574\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierite.jpg","Cordierite. Left: rough specimen showing dichroism; right: cut stone.","No machine-readable author provided. Vzb83~commonswiki assumed (based on copyright claims).",500,342,{"id":538,"source_url":539,"license_code":495,"credit_html":540,"title":541,"description":542,"author":525,"original_width":543,"original_height":544},6258,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=14456274","Didier Descouens, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=14456274\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierite Italie.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"en:Cordierite\">Cordierite\u003C\u002Fa> in rhyolite\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Roccatederighi, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRoccastrada\" class=\"extiw\" title=\"en:Roccastrada\">Roccastrada\u003C\u002Fa>, Grosseto Province, Tuscany, Italy.\u003C\u002Fdd>\n\u003Cdd>Size of view 1.5 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",2340,2761,{"id":546,"source_url":547,"license_code":502,"credit_html":548,"title":549,"description":550,"author":551,"original_width":552,"original_height":553},6259,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=20600241","Claus Ableiter, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=20600241\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierit, Silberberg, Bodenmais.JPG","cordierite, one of the 60 minerals of the silver mines in Bodenmais, Bavarian Forest, in the museum room of the Bersucherbergwerk Silberberg","Claus Ableiter",2144,1860,{"id":555,"source_url":556,"license_code":557,"credit_html":558,"title":559,"description":560,"author":561,"original_width":273,"original_height":562},50705,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=6745374","CC BY 2.0","Beatrice Murch from Buenos Aires, Argentina, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=6745374\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Museo de La Plata - Cordierita.jpg","Cordierita (Mg,Fe)2Al4Si5O18. Córdoba, Argentina.","Beatrice Murch from Buenos Aires, Argentina",1315,{"id":564,"source_url":565,"license_code":495,"credit_html":566,"title":567,"description":568,"author":569,"original_width":570,"original_height":571},6261,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=64079806","Strekeisen, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=64079806\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierite volcanic.jpg","Small sector-twinned cordierite phenocryst in a Rhyolite from San Vincenzo, Tuscany, Italy.","Strekeisen",4272,2848,{"id":573,"source_url":574,"license_code":502,"credit_html":575,"title":576,"description":577,"author":506,"original_width":578,"original_height":579},50706,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10150487","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10150487\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierite-173722.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"en:Cordierite\">Cordierite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRichmond\" class=\"extiw\" title=\"en:Richmond\">Richmond\u003C\u002Fa>, Cheshire County, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNew_Hampshire\" class=\"extiw\" title=\"en:New Hampshire\">New Hampshire\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-24372.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 6.2 x 5.2 x 5.0 cm.\u003C\u002Fdd>\n\u003Cdd>A LARGE, sharp, complete all-around, orthorhombic cordierite crystal. This CLASSIC, old-time, lustrous brown crystal is from the famous finds at Richmond, New Hampshire. The back is contacted, but is not damaged, per se and part of the crystal surface has altered to pinite, a pseudomorph after silicate minerals, especially cordierite. Ex. Ed Ruggiero Collection, who purchased this fine piece from New York dealer Larry Conklin in 1976.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",462,475,{"id":581,"source_url":582,"license_code":495,"credit_html":583,"title":584,"description":585,"author":586,"original_width":587,"original_height":588},6262,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113720754","Koreller, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113720754\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Muséum de Nantes - 235 - Cordiérite (Auvergne, France).jpg","Cordiérite, en provenance d'Auvergne (France), au Muséum de Nantes","Koreller",1792,1300,{"id":590,"source_url":591,"license_code":502,"credit_html":592,"title":593,"description":594,"author":506,"original_width":595,"original_height":596},50707,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10173564","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10173564\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierite-288931.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"en:Cordierite\">Cordierite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wildwood Campground, Rt. 112, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFranconia\" class=\"extiw\" title=\"en:Franconia\">Franconia\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGrafton_County,_New_Hampshire\" class=\"extiw\" title=\"en:Grafton County, New Hampshire\">Grafton County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNew_Hampshire\" class=\"extiw\" title=\"en:New Hampshire\">New Hampshire\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-214873.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 4.4 x 2.7 x 2.3 cm.\u003C\u002Fdd>\n\u003Cdd>A sharp, lustrous, brown, orthorhombic cordierite crystal is attached to a bit of muscovite schist on this rare and fine specimen from a very uncommon New Hampshire locale in the White Mountains. The pinacoid termination is nearly pristine, with only modest edge contacting at the matrix. Ex. Robert Whitmore Collection and self-collected in 1992, according to his label. These are outstanding crystals for the species and this locale is world famous for such pieces.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",565,750,{"id":598,"source_url":599,"license_code":495,"credit_html":600,"title":601,"description":602,"author":603,"original_width":604,"original_height":605},6263,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=132773236","Kaethe17, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=132773236\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierit-2023.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"en:Cordierite\">Cordierite\u003C\u002Fa> (Weight: 39.4 g) – Locality: Puchenau near Linz, Upper Austria.","Kaethe17",4133,2756,{"id":607,"source_url":608,"license_code":502,"credit_html":609,"title":610,"description":611,"author":506,"original_width":612,"original_height":613},50708,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419611","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419611\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierite-14-cordieritebig.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"en:Cordierite\">Cordierite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Richmond Soapstone Quarry (Harris Quarry), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRichmond\" class=\"extiw\" title=\"en:Richmond\">Richmond\u003C\u002Fa>, Cheshire County, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNew_Hampshire\" class=\"extiw\" title=\"en:New Hampshire\">New Hampshire\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-6405.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: large cabinet, 22 x 18 x 9 cm\n\u003Cdl>\u003Cdt>Cordierite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>Cordierite from this locality sets the standard for the species. Unlike the ugly material from most places, it is actually pretty here - sometimes. It has a waxy brown shoe-polish look to the surface on the best specimens, such as this one. This was collected by Bob Whitmore in the 1970s and is a very aesthetic cluster with a bit of attached matrix. Pen shown for scale. Ex. Robert Whitmore Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",799,800,{"id":615,"source_url":616,"license_code":502,"credit_html":617,"title":618,"description":619,"author":506,"original_width":613,"original_height":620},50709,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447026","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447026\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierite-den07-06aa.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"en:Cordierite\">Cordierite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Richmond Soapstone Quarry (Harris Quarry), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRichmond\" class=\"extiw\" title=\"en:Richmond\">Richmond\u003C\u002Fa>, Cheshire County, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNew_Hampshire\" class=\"extiw\" title=\"en:New Hampshire\">New Hampshire\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-6405.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: cabinet, 18.8 x 18.3 x 11.0 cm\n\u003Cdl>\u003Cdt>Cordierite (old classic!)\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>Root-beer-colored , classic barrel-shaped cordierite crystals to almos t2 inches. Perhaps a piece only a musem could love, but SO significant for this turn-of-the-1900s locality, for both the stellar condition and the overall size of the plate. I have never seen the like for sale.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",771,{"id":622,"source_url":623,"license_code":495,"credit_html":624,"title":625,"description":626,"author":627,"original_width":628,"original_height":629},50712,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=83016582","Tõnis Saadre, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=83016582\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Estonian Museum of Natural History Specimen No 176857 photo (g203 g203-9 jpg).jpg","\"kordieriit\". More info \u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fgeocollections.info\u002Ffile\u002F90930\">about this file\u003C\u002Fa> and \u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fgeocollections.info\u002Fspecimen\u002F176857\">about this specimen\u003C\u002Fa> at \u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fgeocollections.info\u002F\">geocollections.info\u003C\u002Fa>","Tõnis Saadre",3172,2236,{"id":631,"source_url":632,"license_code":495,"credit_html":633,"title":634,"description":635,"author":586,"original_width":636,"original_height":637},50713,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113719498","Koreller, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113719498\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Muséum de Nantes - 121 - Cordiérite.jpg","Cordiérite, au Muséum de Nantes",2548,1972,{"id":639,"source_url":640,"license_code":495,"credit_html":641,"title":642,"description":643,"author":586,"original_width":644,"original_height":645},50714,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113720751","Koreller, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113720751\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Muséum de Nantes - 233 - Cordiérite (Nantes, France).jpg","Cordiérite, en provenance de Nantes (France), au Muséum de Nantes",2732,2232,{"id":647,"source_url":648,"license_code":495,"credit_html":649,"title":650,"description":643,"author":586,"original_width":570,"original_height":571},50715,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113720753","Koreller, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113720753\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Muséum de Nantes - 234 - Cordiérite (Nantes, France).jpg",{"id":652,"source_url":653,"license_code":495,"credit_html":654,"title":655,"description":656,"author":657,"original_width":658,"original_height":659},50716,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=128073825","Reinhard Kraasch, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=128073825\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierit-Hornfels (RK 2206 P1890046).jpg","\u003Ca href=\"https:\u002F\u002Fde.wikipedia.org\u002Fwiki\u002FCordierit\" class=\"extiw\" title=\"de:Cordierit\">Cordierit\u003C\u002Fa>-\u003Ca href=\"https:\u002F\u002Fde.wikipedia.org\u002Fwiki\u002FHornfels\" class=\"extiw\" title=\"de:Hornfels\">Hornfels\u003C\u002Fa> aus Unterried bei Bodenmais, Bayerischer Wald – 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",2448,2445,{"id":661,"source_url":662,"license_code":495,"credit_html":663,"title":664,"description":665,"author":666,"original_width":667,"original_height":668},50717,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=148199848","Ringwoodit, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=148199848\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierit-Magnetit-Hornfels XPL.jpg","Cordierit-Magnetit-Hornfels, Dünnschliff, XPL","Ringwoodit",5616,3744,{"id":670,"source_url":671,"license_code":512,"credit_html":672,"title":673,"description":674,"author":675,"original_width":490,"original_height":491},16853,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10716208","John Krygier, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10716208\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Mullite, Cordierite, Tridymite - Bohemia, Czech Republic.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMullite\" class=\"extiw\" title=\"en:Mullite\">Mullite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"en:Cordierite\">cordierite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTridymite\" class=\"extiw\" title=\"en:Tridymite\">tridymite\u003C\u002Fa> (size: 2.5\" x 1.5\" x 1\")\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Česká Kamenice, Děčín (Tetschen), Ústí Region, Bohemia (Böhmen; Boehmen), Czech Republic\u003C\u002Fdd>\n\u003Cdd>\u003Ci>original description:\u003C\u002Fi> Specimen of \"porcelainite\" - a semivitrified chert- or jasper-like rock composed of cordierite, mullite and tridymite, admixture of corundum, and subordinate K-feldspar. The porcelain quality of this mineral is caused by contact with heated basalt or, in this case, a burning coal seam.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>\nPorcelainite was used for tools in prehistory, and is sometimes cut\u002Fpolished for jewelry.","John Krygier",{"id":677,"source_url":678,"license_code":502,"credit_html":679,"title":680,"description":681,"author":506,"original_width":682,"original_height":683},19483,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175071","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175071\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Pinite-33956.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPinite\" class=\"extiw\" title=\"en:Pinite\">Pinite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FV%C3%A4sterby\" class=\"extiw\" title=\"en:Västerby\">Västerby\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAskersund\" class=\"extiw\" title=\"en:Askersund\">Askersund\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FN%C3%A4rke\" class=\"extiw\" title=\"en:Närke\">Närke\u003C\u002Fa>, Sweden (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-12006.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Pinite is not a valid species but is rather a mixture of other rockforming species that replace certain silicate minerals, such as cordierite in particular. This is, I am told, a really really good and not-as-ugly-as-usual specimen of incredibly large cordierite crystals replaced by this mix of mica and other minerals, Neat old label, too! 15 x 10.6 x 9.3 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",600,518,{"id":685,"source_url":686,"license_code":557,"credit_html":687,"title":688,"description":689,"author":690,"original_width":691,"original_height":692},19484,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97560060","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97560060\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cherry blossom stones (pinite) (muscovite mica replacing intergrown cordierite-indialite) (mid-Cretaceous, 98 Ma; Kameoka, Honshu Island, Japan) 2.jpg","“Cherry blossom stones” - pinite (= muscovite mica replacing intergrown cordierite-indialite) from Kameoka, west of Kyoto, Kyoto Prefecture, southwestern Honshu Island, southern Japan.  (Limper Geology Museum specimens, Miami University, Oxford, Ohio, USA)\n\u003Chr>\n\u003Cp>One of the most famous & visually intriguing geologic materials collected in Japan is the cherry blossom stone.  These interesting structures have a complex geologic history.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>What are they now?\nCherry blossom stones are relatively small, subhexagonal-shaped masses of fine-grained muscovite mica that show a flower-like pattern in transverse cross-section.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>What did they used to be?\nThe muscovite mica is not the original material making up these structures.  Before the growth of muscovite mica, these were complex intergrowths of six cordierite crystals and one indialite crystal.  So, cherry blossom stones represent muscovite mica replacing cordierite-indialite (muscovite pseudomorphs after cordierite-indialite).  Such complex pseudomorphs have been referred to as pinite.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>What is the host rock?\nCherry blossom stones are hosted in a matrix of hornfels, a fine-grained, contact metamorphic rock.  Hornfels form by intense alteration (heating & chemical alteration) of shales by nearby lava or magma.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>How did they form?\nThe hornfels host rocks were originally fine-grained siliciclastic sedimentary rocks (shales) of the Tamba Group (Triassic-Jurassic-lowermost Cretaceous).  In the mid-Cretaceous (early Cenomanian Stage, ~98 m.y.), underground igneous activity resulted in granites and granodiorite intrusions altering the shales into hornfels by contact metamorphism.  These hornfels had decent-sized masses of intergrown cordierite-indialite.\n\u003C\u002Fp>\u003Cp>Indialite is a magnesium aluminosilicate mineral (Mg2Al4Si5O18).  Cordierite is an iron magnesium aluminosilicate mineral ((Fe,Mg)2Al4Si5O18).  The subhexagonal-shaped masses of cordierite-indialite in the hornfels consist of seven individual crystals.  At the center of each mass is a dumbbell-shaped indialite crystal - very narrow at the center, and relatively wide at the ends (look at the varying sizes of the center hexagon in the cherry blossom stones shown above).  Surrounding the indialite crystal are six prism-shaped cordierite crystals.  They are widest at the center of each cherry blossom stone and narrowest at the ends.\n\u003C\u002Fp>\u003Cp>A second metamorphic event altered the cordierite-indialite masses.  Hydrothermal metamorphism resulted in fine-grained muscovite mica replacing the original minerals.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Much info. from:\n\u003C\u002Fp>\nRakovan et al. (2006) - Sakura Ishi (cherry blossom stones): mica pseudomorphs of complex cordierite-indialite intergrowths from Kameoka, Kyoto Prefecture, Japan.  in  Minerals from Japan.  Rocks & Minerals Reprint 2006: 31-39.","James St. John",1330,1216,{"id":694,"source_url":695,"license_code":557,"credit_html":696,"title":697,"description":698,"author":690,"original_width":699,"original_height":700},19485,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97560061","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97560061\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cherry blossom stone (pinite) (muscovite mica replacing intergrown cordierite-indialite) (mid-Cretaceous, 98 Ma; Kameoka, Honshu Island, Japan) 1.jpg","“Cherry blossom stone” (9 mm across) - pinite (= muscovite mica replacing intergrown cordierite-indialite) from Kameoka, west of Kyoto, Kyoto Prefecture, southwestern Honshu Island, southern Japan.  The small, central, hexagonal structure represents where indialite used to be.  The “petals” of the cherry blossom flower (= the 6 wedge-shaped masses surrounding the center hexagon) represent where cordierite used to be.\n\u003Chr>\n\u003Cp>One of the most famous & visually intriguing geologic materials collected in Japan is the cherry blossom stone.  These interesting structures have a complex geologic history.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>What are they now?\nCherry blossom stones are relatively small, subhexagonal-shaped masses of fine-grained muscovite mica that show a flower-like pattern in transverse cross-section.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>What did they used to be?\nThe muscovite mica is not the original material making up these structures.  Before the growth of muscovite mica, these were complex intergrowths of six cordierite crystals and one indialite crystal.  So, cherry blossom stones represent muscovite mica replacing cordierite-indialite (muscovite pseudomorphs after cordierite-indialite).  Such complex pseudomorphs have been referred to as pinite.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>What is the host rock?\nCherry blossom stones are hosted in a matrix of hornfels, a fine-grained, contact metamorphic rock.  Hornfels form by intense alteration (heating & chemical alteration) of shales by nearby lava or magma.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>How did they form?\nThe hornfels host rocks were originally fine-grained siliciclastic sedimentary rocks (shales) of the Tamba Group (Triassic-Jurassic-lowermost Cretaceous).  In the mid-Cretaceous (early Cenomanian Stage, ~98 m.y.), underground igneous activity resulted in granites and granodiorite intrusions altering the shales into hornfels by contact metamorphism.  These hornfels had decent-sized masses of intergrown cordierite-indialite.\n\u003C\u002Fp>\u003Cp>Indialite is a magnesium aluminosilicate mineral (Mg2Al4Si5O18).  Cordierite is an iron magnesium aluminosilicate mineral ((Fe,Mg)2Al4Si5O18).  The subhexagonal-shaped masses of cordierite-indialite in the hornfels consist of seven individual crystals.  At the center of each mass is a dumbbell-shaped indialite crystal - very narrow at the center, and relatively wide at the ends (look at the varying sizes of the center hexagon in the cherry blossom stones in this photo album).  Surrounding the indialite crystal are six prism-shaped cordierite crystals.  They are widest at the center of each cherry blossom stone and narrowest at the ends.\n\u003C\u002Fp>\u003Cp>A second metamorphic event altered the cordierite-indialite masses.  Hydrothermal metamorphism resulted in fine-grained muscovite mica replacing the original minerals.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Much info. from:\n\u003C\u002Fp>\nRakovan et al. (2006) - Sakura Ishi (cherry blossom stones): mica pseudomorphs of complex cordierite-indialite intergrowths from Kameoka, Kyoto Prefecture, Japan.  in  Minerals from Japan.  Rocks & Minerals Reprint 2006: 31-39.",666,642,{"id":702,"source_url":703,"license_code":557,"credit_html":704,"title":705,"description":689,"author":690,"original_width":706,"original_height":707},19486,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97560064","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97560064\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cherry blossom stones (pinite) (muscovite mica replacing intergrown cordierite-indialite) (mid-Cretaceous, 98 Ma; Kameoka, Honshu Island, Japan) 4.jpg",1132,1237,{"id":709,"source_url":710,"license_code":557,"credit_html":711,"title":712,"description":689,"author":690,"original_width":713,"original_height":714},19487,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97560065","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97560065\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cherry blossom stones (pinite) (muscovite mica replacing intergrown cordierite-indialite) (mid-Cretaceous, 98 Ma; Kameoka, Honshu Island, Japan) 3.jpg",1060,1048,{"id":716,"source_url":717,"license_code":718,"credit_html":719,"title":720,"description":721,"author":722,"original_width":723,"original_height":724},22006,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576612","CC BY-SA 2.0","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576612\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sekaninaite (cordierite) (Fe2+,Mg)2Al4Si5O18 (24953511895).jpg","\u003Cp>sekaninaite (cordierite) (Fe2+,Mg)2Al4Si5O18\nlocality: Dolní Bory, Czech Republic\nphoto (c) 2014 Jan Helebrant\n\u003C\u002Fp>\n<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.juhele.webnode.cz\">http:\u002F\u002Fwww.juhele.webnode.cz\u003C\u002Fa>\" rel=\"nofollow\">www.juhele.webnode.cz<\u002Fa>","Jan Helebrant",4000,3000,{"id":726,"source_url":727,"license_code":718,"credit_html":728,"title":729,"description":721,"author":722,"original_width":723,"original_height":724},22007,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576613","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576613\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sekaninaite (cordierite) (Fe2+,Mg)2Al4Si5O18 (24585895649).jpg",{"id":731,"source_url":732,"license_code":718,"credit_html":733,"title":734,"description":721,"author":722,"original_width":723,"original_height":724},22008,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576614","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576614\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sekaninaite (cordierite) (Fe2+,Mg)2Al4Si5O18 (24585892959).jpg",{"id":736,"source_url":737,"license_code":718,"credit_html":738,"title":739,"description":721,"author":722,"original_width":723,"original_height":724},22009,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576615","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576615\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sekaninaite (cordierite) (Fe2+,Mg)2Al4Si5O18 (24658024230).jpg",{"id":741,"source_url":742,"license_code":718,"credit_html":743,"title":744,"description":745,"author":722,"original_width":723,"original_height":724},22010,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576796","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576796\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sekaninaite (cordierite) (Fe2+,Mg)2Al4Si5O18 (26110346245).jpg","\u003Cp>sekaninaite (cordierite) (Fe2+,Mg)2Al4Si5O18\nlocality: Dolní Bory, Czech Republic\nphoto (c) 2015 Jan Helebrant\n\u003C\u002Fp>\n<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.juhele.webnode.cz\">http:\u002F\u002Fwww.juhele.webnode.cz\u003C\u002Fa>\" rel=\"nofollow\">www.juhele.webnode.cz<\u002Fa>",{"id":747,"source_url":748,"license_code":718,"credit_html":749,"title":750,"description":745,"author":722,"original_width":723,"original_height":724},22011,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576797","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576797\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sekaninaite (cordierite) (Fe2+,Mg)2Al4Si5O18 (25837506910).jpg",{"id":752,"source_url":753,"license_code":718,"credit_html":754,"title":755,"description":745,"author":722,"original_width":723,"original_height":724},22012,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576801","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84576801\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sekaninaite (cordierite) (Fe2+,Mg)2Al4Si5O18 (25837507710).jpg",{"id":757,"source_url":758,"license_code":512,"credit_html":759,"title":760,"description":761,"author":762,"original_width":763,"original_height":764},32811,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=475244","Ed DeWitt, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=475244\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","AndalusiteSchistUSGS.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAndalusite\" class=\"extiw\" title=\"w:Andalusite\">Andalusite\u003C\u002Fa>-\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"w:Cordierite\">Cordierite\u003C\u002Fa> \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002Fschist\" class=\"extiw\" title=\"w:schist\">schist\u003C\u002Fa> in \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002Fmetasedimentary\" class=\"extiw\" title=\"w:metasedimentary\">metasedimentary\u003C\u002Fa> sequence. Western part of \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFossil_Ridge\" class=\"extiw\" title=\"w:Fossil Ridge\">Fossil Ridge\u003C\u002Fa>. Large brown crystals are andalusite.","Ed DeWitt",431,288,{"id":766,"source_url":767,"license_code":502,"credit_html":768,"title":769,"description":770,"author":506,"original_width":771,"original_height":772},38735,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=31448637","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=31448637\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cordierite (variety cerasite)-540095.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCordierite\" class=\"extiw\" title=\"en:Cordierite\">Cordierite\u003C\u002Fa>, variety \u003Ci>cerasite\u003C\u002Fi>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Sakuratenjin, Kameoka City, Kyoto Prefecture, Kinki Region, Honshu Island, Japan\u003C\u002Fdd>\n\u003Cdd>Size: 0.6 cm x 0.5 cm x 0.4 cm\u003C\u002Fdd>\n\u003Cdd>These beautiful and interestingly shaped thumbnail pseudomorph specimens are called cherry blossom (\"ceras\") stones for their obvious resemblance to cherry blossom petals. The pretty pink \"petals\" are in fact, trapiche cordierite crystals that have been pseudomorphed by muscovite\u002Fsercite. This piece is from temple grounds, where collecting is currently prohibited. Rarely available from this locale. It is accompanied by the former collection label.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",465,382,{"id":115,"source_url":774,"license_code":557,"credit_html":775,"title":776,"description":777,"author":778,"original_width":779,"original_height":780},"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=74327920","James St. John (jsj1771) (https:\u002F\u002Fwww.flickr.com\u002Fpeople\u002Fjsjgeology\u002F), via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=74327920\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hornfels from Mikata on Honshu in Japan.jpg","Hornfels with pinite (= muscovite mica replacing intergrown cordierite-indialite; “cherry blossom stones”), Tamba Group, Mesozoic (Triassic to lowermost Cretaceous), ~98 m.y. contact metamorphic date. \n\u003Cp>Locality: at or near Mikata, Mikata District, Fukui Prefecture, Honshu Island, southern Japan. \n\u003C\u002Fp>\n(Limper Geology Museum specimen, Miami University, Oxford, Ohio, USA)","James St. John (jsj1771) (https:\u002F\u002Fwww.flickr.com\u002Fpeople\u002Fjsjgeology\u002F)",2908,1723,{"id":782,"source_url":783,"license_code":718,"credit_html":784,"title":785,"description":786,"author":722,"original_width":723,"original_height":724},78844,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84575082","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84575082\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sekaninaite (cordierite) (Fe2+,Mg)2Al4Si5O18 on pegmatite rock (13403869364).jpg","\u003Cp>sekaninaite (cordierite) (Fe2+,Mg)2Al4Si5O18 on pegmatite rock\nlocality: Dolní Bory, Czech Republic\nphoto (c) 2013 Jan Helebrant\n\u003C\u002Fp>\n<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.juhele.webnode.cz\">http:\u002F\u002Fwww.juhele.webnode.cz\u003C\u002Fa>\" rel=\"nofollow\">www.juhele.webnode.cz<\u002Fa>",{"id":788,"source_url":789,"license_code":718,"credit_html":790,"title":791,"description":786,"author":722,"original_width":723,"original_height":724},78845,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84575084","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84575084\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sekaninaite (cordierite) (Fe2+,Mg)2Al4Si5O18 on pegmatite rock (13403512715).jpg",[793,800,805,810,815],{"id":794,"url":795,"label":796,"formula":797,"spacegroup":798,"year":799},3178,"\u002Fcif\u002F3178.cif","Sokol 2010","Na.235 O18.646 Mn.02 Li.06 Fe.3 Mg1.66 Be.16 Al3.8 Si5 H1.292","C c c m",2010,{"id":801,"url":802,"label":803,"formula":804,"spacegroup":798,"year":410},3179,"\u002Fcif\u002F3179.cif","Malcherek 2001 · Mg1.984 Fe.034 Al3.982 Si5 O18.54 Na.044 H1.08","Mg1.984 Fe.034 Al3.982 Si5 O18.54 Na.044 H1.08",{"id":806,"url":807,"label":808,"formula":809,"spacegroup":798,"year":410},3180,"\u002Fcif\u002F3180.cif","Malcherek 2001 · Mg1.834 Fe.204 Al3.97 Si4.992 O18.764 Na.084 C.192 H.76","Mg1.834 Fe.204 Al3.97 Si4.992 O18.764 Na.084 C.192 H.76",{"id":811,"url":812,"label":813,"formula":814,"spacegroup":798,"year":410},3181,"\u002Fcif\u002F3181.cif","Malcherek 2001 · Mg1.752 Fe.284 Al3.964 Si5 O18.39 Na.052 H.78","Mg1.752 Fe.284 Al3.964 Si5 O18.39 Na.052 H.78",{"id":816,"url":817,"label":818,"formula":819,"spacegroup":798,"year":410},3182,"\u002Fcif\u002F3182.cif","Malcherek 2001 · Mg1.604 Fe.424 Al3.972 Si5 O18.5 Na.046 H","Mg1.604 Fe.424 Al3.972 Si5 O18.5 Na.046 H",[821,822,823,824,825,826,827,828,829,830,831,832,833,834,835,836,837,838,839,840,841,842,843],"Dichroit","Dichroita","Dichroite","Esmarkite (of Berzelius)","Hard Fahlunite","Iolit","Iolita","Iolith","Jolit","Jolita","Jolite","Lazulith (of van Schlotheim)","Lazulith (of von Schlotheim)","Luchsapphir","Luchssaphir","Peliom","Spanish Lazulite","Steinheilit","Steinheilita","Steinheilite","Tanolite","Wassersaphir","Water Sapphire",[845,849,853,857,861,865,868,871,875,880,884,888,896,900,904,908,916,922,926,930,933,936,939,943,946,950,953,957,960,964,969,972,977,980,983,989,993,997,1001,1005,1008,1012,1016,1019,1022,1026,1029,1032,1035,1038,1041],{"lang":846,"names":847},"ar",[848],"كورديريت",{"lang":850,"names":851},"az",[852],"Kordiyerit",{"lang":854,"names":855},"be",[856],"Кардыерыт",{"lang":858,"names":859},"ca",[860],"cordierita",{"lang":862,"names":863},"cs",[864],"Cordierit",{"lang":866,"names":867},"de",[864,821,828],{"lang":869,"names":870},"es",[860],{"lang":872,"names":873},"et",[874],"kordieriit",{"lang":876,"names":877},"eu",[878,879],"Cordierita","Kordierita",{"lang":881,"names":882},"fa",[883],"کوردیریت",{"lang":885,"names":886},"fi",[887],"kordieriitti",{"lang":889,"names":890},"fr",[891,892,110,97,893,894,840,895],"Cordiérite","Dichroïte","Quartz bleu de la Nouvelle-Finlande","Saphir d'eau","Yolithe",{"lang":897,"names":898},"he",[899],"קורדיאריט",{"lang":901,"names":902},"hu",[903],"Kordierit",{"lang":905,"names":906},"hy",[907],"Կորդիերիտ",{"lang":909,"names":910},"it",[911,912,913,914,915],"cordierite","diocrite","iolite","zaffiro d'acqua","zaffiro di lince",{"lang":917,"names":918},"ja",[919,920,921],"きん青石","コーディエライト","菫青石",{"lang":923,"names":924},"kk",[925],"Кордиерит",{"lang":927,"names":928},"kk-arab",[929],"كوردىييەرىيت",{"lang":931,"names":932},"kk-cn",[929],{"lang":934,"names":935},"kk-cyrl",[925],{"lang":937,"names":938},"kk-kz",[925],{"lang":940,"names":941},"kk-latn",[942],"Kordïyerït",{"lang":944,"names":945},"kk-tr",[942],{"lang":947,"names":948},"ko",[949],"근청석",{"lang":951,"names":952},"ky",[925],{"lang":954,"names":955},"mg",[956],"Kôrdierita",{"lang":958,"names":959},"mk",[925],{"lang":961,"names":962},"nb",[963],"cordieritt",{"lang":965,"names":966},"nl",[967,968],"cordieriet","Ioliet",{"lang":970,"names":971},"nn",[963],{"lang":973,"names":974},"pl",[821,975,826,976],"Ijolit","Kordieryt",{"lang":978,"names":979},"pt",[860,911],{"lang":981,"names":982},"pt-br",[860,911],{"lang":984,"names":985},"ru",[986,987,925,988],"Дихроит","Иолит","Штейнгейлит",{"lang":990,"names":991},"sl",[992],"kordierit",{"lang":994,"names":995},"sr",[996],"кордиљерит",{"lang":998,"names":999},"sr-ec",[1000],"Кордиљерит",{"lang":1002,"names":1003},"sr-el",[1004],"kordijerit",{"lang":1006,"names":1007},"sv",[992],{"lang":1009,"names":1010},"tr",[1011],"İyolit",{"lang":1013,"names":1014},"uk",[1015],"кордієрит",{"lang":1017,"names":1018},"uz",[852],{"lang":1020,"names":1021},"vi",[864],{"lang":1023,"names":1024},"zh",[1025],"堇青石",{"lang":1027,"names":1028},"zh-cn",[1025],{"lang":1030,"names":1031},"zh-hans",[1025],{"lang":1033,"names":1034},"zh-hant",[1025],{"lang":1036,"names":1037},"zh-hk",[1025],{"lang":1039,"names":1040},"zh-sg",[1025],{"lang":1042,"names":1043},"zh-tw",[1025],"Q410336",{"history":11,"applications":11}]