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3-4H\u003Csub>2\u003C\u002Fsub>O","(Na,Ca,K,Ba,Sr)\u003Csub>1-x\u003C\u002Fsub>(Mn,Mg,Al)\u003Csub>6\u003C\u002Fsub>O\u003Csub>12\u003C\u002Fsub>·3-4H\u003Csub>2\u003C\u002Fsub>O",1.5,"3.67","3.65",24311,{"id":283,"name":284,"entrytype":9,"csystem":102,"ima_formula":285,"mindat_formula":285,"hmin":49,"hmax":49,"dmeas":286,"dcalc":287,"primary_image_id":288},4196,"Vlasovite","Na\u003Csub>2\u003C\u002Fsub>ZrSi\u003Csub>4\u003C\u002Fsub>O\u003Csub>11\u003C\u002Fsub>","2.92","3.07",9957,[290,295,301,302],{"id":291,"name":292,"entrytype":9,"csystem":293,"ima_formula":15,"mindat_formula":15,"hmin":11,"hmax":11,"dmeas":37,"dcalc":294,"primary_image_id":11},27460,"Kokchetavite","Hexagonal","2.45",{"id":296,"name":297,"entrytype":9,"csystem":298,"ima_formula":299,"mindat_formula":299,"hmin":11,"hmax":11,"dmeas":11,"dcalc":300,"primary_image_id":11},45898,"Liebermannite","Tetragonal","KAlSi\u003Csub>3\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>","3.975",{"id":107,"name":108,"entrytype":9,"csystem":102,"ima_formula":15,"mindat_formula":15,"hmin":49,"hmax":49,"dmeas":109,"dcalc":110,"primary_image_id":111},{"id":113,"name":114,"entrytype":9,"csystem":102,"ima_formula":15,"mindat_formula":15,"hmin":49,"hmax":49,"dmeas":53,"dcalc":53,"primary_image_id":115},[304,308],{"id":305,"txt":306,"latitude":11,"longitude":11,"country":307},2457,"Arendal, Agder, Norway","Norway",{"id":309,"txt":310,"latitude":311,"longitude":312,"country":307},13666,"Stavern (Fredriksvärn), Larvik Commune, Vestfold, Norway",58.9984085,10.0352216,4783,[315,319,323,326,330,334,337,342,346,350,355,359,363,367,371,376],{"id":316,"year":317,"html":318,"doi":11},15940794,1830,"Breithaupt, A. (1830): Ueber die Felsite und einige neue Specien ihres Geschlechts. Journal für Chemie und Physik, 60: 316-330",{"id":320,"year":321,"html":322,"doi":11},524857,1968,"Wright, Thomas L., Stewart, David B. (1968) X-ray and optical study of alkali feldspar: I. Determination of composition and structural state from refined unit-cell parameters and 2V. \u003Ci>American Mineralogist\u003C\u002Fi>,  53 (1-2) 38-87 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM53\u002FAM53_38.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":324,"year":321,"html":325,"doi":11},524858,"Wright, Thomas L. (1968) X-ray and optical study of alkali feldspar: II. An X-ray method for determining the composition and structural state from measurement of 2θ values for three reflections. \u003Ci>American Mineralogist\u003C\u002Fi>,  53 (1-2) 88-104 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM53\u002FAM53_88.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":327,"year":328,"html":329,"doi":11},16117146,1971,"Bachinski, S.W., Müller, G. (1971) Experimental determinations of the microcline-low albite solvus. Journal of Petrology: 1(2): 329-356.",{"id":331,"year":332,"html":333,"doi":11},16117147,1979,"Ferguson, R.B. (1979) Whence orthoclase and microcline? A crystallographer's interpretation of potassium feldspar phase relations. The Canadian Mineralogist: 17: 515-525.",{"id":335,"year":332,"html":336,"doi":11},16117148,"Cherry, M.E., Trembath, L.T. (1979) The disordering of alkali feldspars; I, Dry heating of a microcline perthite. The Canadian Mineralogist: 17: 527-535.",{"id":338,"year":339,"html":340,"doi":341},75023,1980,"Eggleton, Richard A., Buseck, Peter R. (1980) The orthoclase-microcline inversion: A high-resolution transmission electron microscope study and strain analysis. \u003Ci>Contributions to Mineralogy and Petrology\u003C\u002Fi>,  74 (2) 123-133 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf01131998'>doi:10.1007\u002Fbf01131998\u003C\u002Fa>","10.1007\u002Fbf01131998",{"id":343,"year":344,"html":345,"doi":11},16117150,1982,"Fitz Gerald, J.D., McLaren, A.C. (1982) The microstructures of microcline from some granitic rocks and pegmatites. Contributions to Mineralogy and Petrology: 80: 219-229.",{"id":347,"year":348,"html":349,"doi":11},16117151,1984,"(1984) Bulletin de la Société française de Minéralogie et de Cristallographie: 107: 401.",{"id":351,"year":352,"html":353,"doi":354},165203,1988,"Goldsmith, Julian R. (1988) Enhanced Al\u002FSi Diffusion in KAlSi\u003Csub>3\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub> at High Pressures: The Effect of Hydrogen. \u003Ci>The Journal of Geology\u003C\u002Fi>,  96 (2). 109-124 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1086\u002F629204'>doi:10.1086\u002F629204\u003C\u002Fa>","10.1086\u002F629204",{"id":356,"year":357,"html":358,"doi":11},16117153,1990,"London, D., Cerny, P., Loomis, J., Pan, J.J. (1990) Phosphorus in alkali feldspars of rare-element granitic pegmatites. The Canadian Mineralogist: 28: 771-786.",{"id":360,"year":361,"html":362,"doi":11},16117154,1993,"Waldron, K.A., Parsons, I., Brown, W.L. (1993) Solution-redeposition and the orthoclase-microcline transformation: evidence from granulites and relevance to 18O exchange. Mineralogical Magazine: 57: 687-695.",{"id":364,"year":365,"html":366,"doi":11},16117155,1997,"Allan, D.R. Angel, R.J. (1997) A high-pressure structural study of microcline (KAlSi3O8) to 7 GPa. European Journal of Mineralogy: 9: 263-275.",{"id":368,"year":369,"html":370,"doi":11},16966023,2001,"(2001) Microcline. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fmicrocline.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":372,"year":373,"html":374,"doi":375},17080269,2023,"Franceschi, Giada, Conti, Andrea, Lezuo, Luca, Abart, Rainer, Mittendorfer, Florian, Schmid, Michael, Diebold, Ulrike (2023) How Water Binds to Microcline Feldspar (001) \u003Ci>The Journal of Physical Chemistry Letters\u003C\u002Fi>, 15-22 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1021\u002Facs.jpclett.3c03235'>doi:10.1021\u002Facs.jpclett.3c03235\u003C\u002Fa>","10.1021\u002Facs.jpclett.3c03235",{"id":377,"year":378,"html":379,"doi":380},19768194,2026,"Wang, Baoyun; Xiang, Meisu (2026) First-Principles Study of the Structural Evolution of Microcline Under High Pressure. \u003Ci>Crystals\u003C\u002Fi>,  16 (3).  \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3390\u002Fcryst16030214'>doi:10.3390\u002Fcryst16030214\u003C\u002Fa>","10.3390\u002Fcryst16030214",[382,390,397,407,411,419,427,431,435,443,451,459,469,477,485,492,499,508,517,527,535,543,552,559,569,578,586,593,601,608,615,623,630,637,644,651,657,664,673,680,688,695,701,707,715,721,728],{"id":383,"source_url":384,"license_code":385,"credit_html":386,"title":387,"description":11,"author":11,"original_width":388,"original_height":389},16209,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=451709","CC BY-SA 2.0","Unknown author, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=451709\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Microcline.jpeg",1905,1497,{"id":391,"source_url":392,"license_code":393,"credit_html":394,"title":7,"description":11,"author":11,"original_width":395,"original_height":396},30188,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F112813","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\u002F112813\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana",1000,666,{"id":398,"source_url":399,"license_code":400,"credit_html":401,"title":402,"description":403,"author":404,"original_width":405,"original_height":406},16210,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10158525","CC BY-SA 3.0","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10158525\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Microcline-199473.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Papachacra, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBel%C3%A9n_Department\" class=\"extiw\" title=\"en:Belén Department\">Belen Department\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCatamarca\" class=\"extiw\" title=\"en:Catamarca\">Catamarca\u003C\u002Fa>, Argentina (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-8381.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 9.9 x 9.0 x 5.3 cm.\u003C\u002Fdd>\n\u003Cdd>This is a superb microcline specimen from Argentina. The crystals are razor-sharp, and they have a light pastel salmon color (a little deeper in person) that adds to the beauty. You can see a little \"snowfall\" of albite on some of the crystals. From the collection of Argentine dealer Eduardo Jawerbaum.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",750,720,{"id":408,"source_url":409,"license_code":393,"credit_html":410,"title":7,"description":11,"author":11,"original_width":395,"original_height":396},30189,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F112675","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F112675\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana",{"id":412,"source_url":413,"license_code":414,"credit_html":415,"title":416,"description":11,"author":11,"original_width":417,"original_height":418},67611,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=289709","CC BY-SA 2.5","Unknown author, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=289709\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Microclina2EZ.jpg",588,602,{"id":420,"source_url":421,"license_code":400,"credit_html":422,"title":423,"description":424,"author":404,"original_width":425,"original_height":426},16211,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10448500","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10448500\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Microcline-fel1c.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Hashupa, Shigar Valley, northeast of Skardu, Pakistan\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 6.5 x 6.4 x 4.6 cm\n\u003Cdl>\u003Cdt>Microcline\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This particular specimen is complete, untwinned, doubly terminated, and on a matrix of smaller microcline crystals.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",388,400,{"id":428,"source_url":429,"license_code":393,"credit_html":430,"title":7,"description":11,"author":11,"original_width":395,"original_height":396},30190,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F114890","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F114890\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana",{"id":432,"source_url":433,"license_code":393,"credit_html":434,"title":7,"description":11,"author":11,"original_width":395,"original_height":396},30191,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F119135","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F119135\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana",{"id":436,"source_url":437,"license_code":400,"credit_html":438,"title":439,"description":440,"author":404,"original_width":441,"original_height":442},67612,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10122150","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10122150\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Tourmaline-Microcline-Quartz-24545.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTourmaline\" class=\"extiw\" title=\"en:Tourmaline\">Tourmaline\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuartz\" class=\"extiw\" title=\"en:Quartz\">Quartz\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Himalaya Mine (Himalaya pegmatite; Himalaya dikes), Gem Hill, Mesa Grande District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSan_Diego_County,_California\" class=\"extiw\" title=\"en:San Diego County, California\">San Diego 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-3559.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>A very interesting Himalaya Mine combination piece of very gemmy and lustrous pencil tourmalines to 2.5 cm long and euhedral microcline crystals embedded in and on a lustrous, transparent and terminated smoky quartz crystal. 6.7 x 4.6 x 4.0 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",587,647,{"id":444,"source_url":445,"license_code":400,"credit_html":446,"title":447,"description":448,"author":404,"original_width":449,"original_height":450},67613,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10130146","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10130146\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Microcline-40660.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FShigar_Valley\" class=\"extiw\" title=\"en:Shigar Valley\">Shigar Valley\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSkardu_District\" class=\"extiw\" title=\"en:Skardu District\">Skardu District\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaltistan\" class=\"extiw\" title=\"en:Baltistan\">Baltistan\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGilgit-Baltistan\" class=\"extiw\" title=\"en:Gilgit-Baltistan\">Northern Areas\u003C\u002Fa>, Pakistan (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5420.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>A large, showy, pristine, complete all-around, lustrous, snow-white CABINET microcline crystal from the recent find in Pakistan. A couple of the faces are preferentially overgrown by lustrous and transparent light-gray microcline. These are some of the finest microclines found from any locality in recent years. 10.5 x 3.6 x 3.6 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",249,625,{"id":452,"source_url":453,"license_code":400,"credit_html":454,"title":455,"description":456,"author":404,"original_width":457,"original_height":458},67614,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10147099","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10147099\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Microcline-158576.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Hachupa (Hashupi), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FShigar_Valley\" class=\"extiw\" title=\"en:Shigar Valley\">Shigar Valley\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSkardu_District\" class=\"extiw\" title=\"en:Skardu District\">Skardu District\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaltistan\" class=\"extiw\" title=\"en:Baltistan\">Baltistan\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGilgit-Baltistan\" class=\"extiw\" title=\"en:Gilgit-Baltistan\">Northern Areas\u003C\u002Fa>, Pakistan (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-2532.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 7.4 x 6.0 x 5.7 cm.\u003C\u002Fdd>\n\u003Cdd>A BEAUTIFUL, nearly pristine, complete all-around, lustrous, pearlescent microcline crystal cluster with textbook crystal faces from the recent find in Pakistan. The STRIKING, large, sharp, wedge-shaped termination face is twinned and is frosted snow-white. All sides of this showy crystal are preferentially overgrown by lustrous and transparent light-gray microcline. These are some of the finest microclines found from any locality in recent years. A super-slight termination edge bruise is certainly not a detraction.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",399,500,{"id":460,"source_url":461,"license_code":462,"credit_html":463,"title":464,"description":465,"author":466,"original_width":467,"original_height":468},16214,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=132619662","CC BY-SA 4.0","Eric Polk, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=132619662\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Microcline NHMLA.png","Sample of Microcline collected at Box Spring, Riverside County, California, USA.  On display at the Natural History Museum of Los Angeles County, Los Angeles, California, USA.","Eric Polk",1236,1937,{"id":470,"source_url":471,"license_code":400,"credit_html":472,"title":473,"description":474,"author":404,"original_width":475,"original_height":476},67615,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10149356","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10149356\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Microcline-168744.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Hachupa (Hashupi), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FShigar_Valley\" class=\"extiw\" title=\"en:Shigar Valley\">Shigar Valley\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSkardu_District\" class=\"extiw\" title=\"en:Skardu District\">Skardu District\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaltistan\" class=\"extiw\" title=\"en:Baltistan\">Baltistan\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGilgit-Baltistan\" class=\"extiw\" title=\"en:Gilgit-Baltistan\">Northern Areas\u003C\u002Fa>, Pakistan (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-2532.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 8.0 x 7.5 x 4.5 cm.\u003C\u002Fdd>\n\u003Cdd>A showy and excellent microcline plate dominated by beautiful, complete all-around and pristine, Carlsbad-twinned crystal. This piece has nice form, with the smaller microclines as the matrix. The crystals have pearlescent lustre and are preferentially overgrown by lustrous and transparent light-gray microcline. These are some of the finest microclines found from any locality in recent years.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",550,548,{"id":478,"source_url":479,"license_code":400,"credit_html":480,"title":481,"description":482,"author":404,"original_width":483,"original_height":484},67617,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10170452","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10170452\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Quartz-Microcline-267175.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuartz\" class=\"extiw\" title=\"en:Quartz\">Quartz\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSmoky_quartz\" class=\"extiw\" title=\"en:Smoky quartz\">Smoky Quartz\u003C\u002Fa>), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Papachacra, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBel%C3%A9n_Department\" class=\"extiw\" title=\"en:Belén Department\">Belen Department\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCatamarca\" class=\"extiw\" title=\"en:Catamarca\">Catamarca\u003C\u002Fa>, Argentina (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-8381.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 7.4 x 7.3 x 5.8 cm.\u003C\u002Fdd>\n\u003Cdd>A fine, mounded, combination specimen from recent finds in Argentina. Glassy, nearly transparent smoky quartz crystals are very attractively scattered amongst cream-colored microcline crystals. The interesting, perched smoky quartz atop the mound is 2.3 cm. Highly representative of the species and locale.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",579,600,{"id":486,"source_url":487,"license_code":400,"credit_html":488,"title":489,"description":490,"author":404,"original_width":491,"original_height":426},67618,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10448515","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10448515\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Microcline-fel17b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Hashupa, Shigar Valley, northeast of Skardu, Pakistan\u003C\u002Fdd>\n\u003Cdd>Size: cabinet, 12.8 x 7 x 6.8 cm\n\u003Cdl>\u003Cdt>Microcline\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This large microcline is highlighted by a crystal which is almost 13 cm in length and 7 cm across. Not only does it have wonderful luster caused by the overgrowth, but the termination exhibits a stark white color. The addition of the smaller 6 cm crystal and the matrix of sub-cm size crystals all add to the elegance of the specimen, makign it really stand out from the crowd here.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",279,{"id":493,"source_url":494,"license_code":400,"credit_html":495,"title":496,"description":497,"author":404,"original_width":426,"original_height":498},67619,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10448527","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10448527\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Microcline-fel4b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Hashupa, Shigar Valley, northeast of Skardu, Pakistan\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 5.2 x 4.5 x 3.5 cm\n\u003Cdl>\u003Cdt>Microcline\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This is a doubly terminated, albite-style twinned microcline crystal rising up from smaller feldspar crystals. It is over 4 cm in length and exhibits a thick white core and a thin glassy overgrowth.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",376,{"id":500,"source_url":501,"license_code":462,"credit_html":502,"title":503,"description":504,"author":505,"original_width":506,"original_height":507},67621,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=83012670","Mai Seppel, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=83012670\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Estonian Museum of Natural History Specimen No 201972 photo (g27 g27-304 1 jpg).jpg","\"mikrokliin\". More info \u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fgeocollections.info\u002Ffile\u002F91477\">about this file\u003C\u002Fa> and \u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fgeocollections.info\u002Fspecimen\u002F201972\">about this specimen\u003C\u002Fa> at \u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fgeocollections.info\u002F\">geocollections.info\u003C\u002Fa>","Mai Seppel",2067,1516,{"id":509,"source_url":510,"license_code":462,"credit_html":511,"title":512,"description":513,"author":514,"original_width":515,"original_height":516},55085,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=162694062","Jan Czeczotka, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=162694062\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Florencit (Stiepelmannit), Mikroklin - Stiepelmann Mine, Arandis, Namibia - 5,98 g.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFlorencite-(Ce)\" class=\"extiw\" title=\"en:Florencite-(Ce)\">Florencite-(Ce)\u003C\u002Fa> (formerly \u003Ci>florencite\u003C\u002Fi>; also \u003Ci>stiepelmannite\u003C\u002Fi>), \u003Ca href=\"https:\u002F\u002Fde.wikipedia.org\u002Fwiki\u002FMicroclin\" class=\"extiw\" title=\"de:Microclin\">microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Weight: 5.98 g\u003C\u002Fdd>\n\u003Cdd>Locality: Stiepelmann Mine, Arandis, Erongo, Namibia\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Jan Czeczotka",6235,4166,{"id":518,"source_url":519,"license_code":520,"credit_html":521,"title":522,"description":523,"author":524,"original_width":525,"original_height":526},16212,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=12788839","CC0 1.0","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=12788839\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Liddicoatite, microcline 2.jpg","crystals of tourmaline var. liddicoatite, crystals of feldspar var. microcline : Ampanodiana South pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa Commune, Betafo District, Vakinankaratra Region, Antananarivo Province, Madagascar","Parent Géry",4288,2848,{"id":528,"source_url":529,"license_code":393,"credit_html":530,"title":531,"description":532,"author":533,"original_width":534,"original_height":534},3178,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=87318183","Marie-Lan Taÿ Pamart, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=87318183\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Beryllonite microcline lepidolite MNHN Minéralogie.jpg","Beryllonite, microcline and lepidolite from the Paprok mine, Nuristan, Afghanistan. Gallery of Mineralogy and Geology of the French National Museum of Natural History in Paris.","Marie-Lan Taÿ Pamart",4500,{"id":536,"source_url":537,"license_code":462,"credit_html":538,"title":539,"description":540,"author":466,"original_width":541,"original_height":542},16213,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=132578587","Eric Polk, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=132578587\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Serandite on microcline.png","Sample of serandite on microcline collected from Mont St. Hilare, Quebec, Canada. On display at the Natural History Museum of Los Angeles County, Los Angeles, California.",2979,2277,{"id":544,"source_url":545,"license_code":520,"credit_html":546,"title":547,"description":548,"author":549,"original_width":550,"original_height":551},16215,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=166156533","TheUltimateGrass, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=166156533\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Microcline with smoky quartz.jpg","Microcline with bits of smoky quartz","TheUltimateGrass",1536,2048,{"id":553,"source_url":554,"license_code":400,"credit_html":555,"title":556,"description":557,"author":404,"original_width":484,"original_height":558},67616,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10163765","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10163765\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Quartz-Microcline-230160.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuartz\" class=\"extiw\" title=\"en:Quartz\">Quartz\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSmoky_quartz\" class=\"extiw\" title=\"en:Smoky quartz\">Smoky Quartz\u003C\u002Fa>), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPikes_Peak\" class=\"extiw\" title=\"en:Pikes Peak\">Pikes Peak\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTeller_County,_Colorado\" class=\"extiw\" title=\"en:Teller County, Colorado\">Teller County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FColorado\" class=\"extiw\" title=\"en:Colorado\">Colorado\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-120804.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 8.7 x 8.3 x 5.2 cm.\u003C\u002Fdd>\n\u003Cdd>A typical Pikes Peak combination of stark white feldspar with contrasting smoky quartz crystals. Ex. Harold Urish Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",573,{"id":560,"source_url":561,"license_code":562,"credit_html":563,"title":564,"description":565,"author":566,"original_width":567,"original_height":568},7927,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=23952414","Public domain","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=23952414\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Arfvedsonit, Eudialyte, Microcline-289192.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArfvedsonite\" class=\"extiw\" title=\"en:Arfvedsonite\">Arfvedsonite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEudialyte\" class=\"extiw\" title=\"en:Eudialyte\">Eudialyte\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa> (FOV 2.2 x 2.9 mm)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality:  Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada\u003C\u002Fdd>\n\u003Cdd>Arfvedsonite is rare at STA. This small, nearly black, xl is about as good as it gets - i.e. not very good. The orange xl is \"eudialyte group\". So far, only plain eudialyte has been verified at STA but it's always possible other species will turn up.\u003C\u002Fdd>\n\u003Cdd>Note: According to Laszlo Horvath, color is not a reliable (or even useful) guide for distinguishing eudialyte group members at MSH. So the orange color does NOT mean that it can't be just plain eudialyte at STA. In fact orange and pink\u002Fred \"eudialyte\" are about equally common here. From a very unusual association with (verified) epistolite,zakharovite, (verified) phillipsite-K, aegirine (some visible in the photo), serandite, polylithionite, natrolite and analcime.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Modris Baum",791,1024,{"id":570,"source_url":571,"license_code":462,"credit_html":572,"title":573,"description":574,"author":575,"original_width":576,"original_height":577},271,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=82985254","Tõnis Saadre, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=82985254\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Estonian Museum of Natural History Specimen No 177549 photo (g220 g220-3 1 jpg).jpg","\"enigmatiit\", \"enigmatiit\", \"eudialiit\", \"mikrokliin\". More info \u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fgeocollections.info\u002Ffile\u002F90954\">about this file\u003C\u002Fa> and \u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fgeocollections.info\u002Fspecimen\u002F177549\">about this specimen\u003C\u002Fa> at \u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fgeocollections.info\u002F\">geocollections.info\u003C\u002Fa>","Tõnis Saadre",2045,2908,{"id":579,"source_url":580,"license_code":562,"credit_html":581,"title":582,"description":583,"author":566,"original_width":584,"original_height":585},4850,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=119218487","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=119218487\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Polylithionite, Microcline, Albite-1209393.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPolylithionite\" class=\"extiw\" title=\"en:Polylithionite\">Polylithionite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAlbite\" class=\"extiw\" title=\"en:Albite\">Albite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Field of view: 7.1 x 4.7 mm\u003C\u002Fdd>\n\u003Cdd>Locality: Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada\u003C\u002Fdd>\n\u003Cdd>Description: Found August 1996. This is a comparison of SW UV fluorescence and visible light images. The UV image was made using a small SW UV LED “flashlight”. The response of the polylithionite in this case is almost pure bright yellow. There is no hint of the greenish tinge often seen for polylthionite. Hand-held, with the UV source about 5 cm from the specimen, the “glow” is easily visible from across a room, even in partial daylight. But the polylithionite from this find occurs as small isolated groups, so these are not “display” specimens. The magenta glow in the background is microcline. The paler, more pinkish, stuff in the foreground is albite. The specimen also has catapleiite and “pyrochlore”, but they are not visiblet in these photos.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",5184,6912,{"id":587,"source_url":588,"license_code":462,"credit_html":589,"title":590,"description":591,"author":575,"original_width":365,"original_height":592},272,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=83080808","Tõnis Saadre, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=83080808\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Estonian Museum of Natural History Specimen No 177549 photo (g220 g220-3 2 jpg).jpg","\"enigmatiit\", \"eudialiit\", \"mikrokliin\". More info \u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fgeocollections.info\u002Ffile\u002F90953\">about this file\u003C\u002Fa> and \u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fgeocollections.info\u002Fspecimen\u002F177549\">about this specimen\u003C\u002Fa> at \u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fgeocollections.info\u002F\">geocollections.info\u003C\u002Fa>",2800,{"id":594,"source_url":595,"license_code":562,"credit_html":596,"title":597,"description":598,"author":566,"original_width":599,"original_height":600},3316,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=12690803","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=12690803\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Birnessite, Rancieite, Microcline, Aegirine - Demix-Varennes quarry, Saint-Amable sill, Quebec, Canada.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBirnessite\" class=\"extiw\" title=\"en:Birnessite\">Birnessite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRancieite\" class=\"extiw\" title=\"en:Rancieite\">Rancieite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAegirine\" class=\"extiw\" title=\"en:Aegirine\">Aegirine\u003C\u002Fa> (picture width: 2.6 x 2.8 mm)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada\u003C\u002Fdd>\n\u003Cdd>\u003Ci>Original description:\u003C\u002Fi> Pseudomorph of birnessite\u002Francieite after serandite. (Thanks to Laszlo Horvath for information regarding the rancieite.) Most such PS at STA are jet black. Perhaps this one has not yet altered completely. The microcline is white. Aegirine tufts are olive brown.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",471,519,{"id":602,"source_url":603,"license_code":400,"credit_html":604,"title":605,"description":606,"author":404,"original_width":484,"original_height":607},4843,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10030122","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10030122\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Catapleiite-Microcline-20249.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCatapleiite\" class=\"extiw\" title=\"en:Catapleiite\">Catapleiite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMont_Saint-Hilaire\" class=\"extiw\" title=\"en:Mont Saint-Hilaire\">Mont Saint-Hilaire\u003C\u002Fa>, Rouville RCM, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMont%C3%A9r%C3%A9gie\" class=\"extiw\" title=\"en:Montérégie\">Montérégie\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuebec\" class=\"extiw\" title=\"en:Quebec\">Québec\u003C\u002Fa>, Canada (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-599.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>This is a crude but EXTREMELY large crystal for the species, that measures nearly 5 cm across and is about 1 cm thick . It does have some edge damage on a few upper faces to teh sides of the termination, not visible form teh display face in any case. Still, it is a monstrous single crystal of a species that normally forms thin, flat platy crystals. Thus, it may not be the prettiest one, but it IS up there in significance. The fat crystal sits perched on a shard of white feldspar matrix, standing straight up. It is included a bit (with aegerine?) and so the pictures are poor compared to the specimen because of the way light reflects when we shoot it - in person, it is somehwat included but not as dark on the front as you see it here. 5.2 x 4.8 x 4.4 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",476,{"id":609,"source_url":610,"license_code":562,"credit_html":611,"title":612,"description":613,"author":566,"original_width":568,"original_height":614},5884,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=23018938","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=23018938\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Clinoptilolite-K, Eudialyte, Microcline-169452.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FClinoptilolite-K\" class=\"extiw\" title=\"en:Clinoptilolite-K\">Clinoptilolite-K\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEudialyte\" class=\"extiw\" title=\"en:Eudialyte\">Eudialyte\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa> (FOV 3.5 x 2.4 mm)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada\u003C\u002Fdd>\n\u003Cdd>\u003Ci>Original description:\u003C\u002Fi> This is from the only find of clinoptilolite-K at MSH. It was made by Dick Tillet and I thank him and Ralph Thomas for the specimen. MOB coll.\u003C\u002Fdd>\n\u003Cdd>Most of the clinoptilolite from this find is colorless and transparent. These xls are unusual but at the EDS level they are the same as the others.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",716,{"id":616,"source_url":617,"license_code":562,"credit_html":618,"title":619,"description":620,"author":621,"original_width":395,"original_height":622},7761,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=50459162","Mark Joseph Wylie, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=50459162\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Elpasolite, Fluorite, Microcline-13897.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FElpasolite\" class=\"extiw\" title=\"en:Elpasolite\">Elpasolite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFluorite\" class=\"extiw\" title=\"en:Fluorite\">Fluorite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa> (Var: Amazonite), Dimensions: 7 cm x 3 cm x 1 cm\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Morefield Mine (Morefield pegmatite), Winterham, Amelia Co., Virginia, USA\u003C\u002Fdd>\n\u003Cdd>\u003Ci>Original description:\u003C\u002Fi> XRD samples of blue-violet fluorecent alumino-fluoride material turn out to be elpasolite & the crust a mixture of fluorite & apatite fluorescing cream\u002Fwhite also has micro xls of ralstonite & thomsenolite, a patch of purple elpasolite and the amazonite marker. (7x3x1cm)\u003C\u002Fdd>\n\u003Cdd>From the Morefield yard, May\u002F2002. Collector & owner MWylie Photo by Shaun Mackey\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Mark Joseph Wylie",670,{"id":624,"source_url":625,"license_code":520,"credit_html":626,"title":627,"description":628,"author":566,"original_width":629,"original_height":568},8770,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=86319845","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=86319845\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Ferroceladonite, Smoky Quartz, Microcline-171040.jpg","The specimen is roughly 4 x 5 x 3 cm. Found Sept 1996. MOB coll. Ferroceladonite (the green stuff) is not really common at MSH (Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada). But when found it covers everything! Here it is covering smoky quartz xls (to about 1 cm) and microcline. The broken smoky quartz xls along the edges look almost black.",837,{"id":631,"source_url":632,"license_code":562,"credit_html":633,"title":634,"description":635,"author":566,"original_width":636,"original_height":568},9373,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=77267996","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=77267996\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Niveolanite, Aegirine, Rhodochrosite, Microcline-164748.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNiveolanite\" class=\"extiw\" title=\"en:Niveolanite\">Niveolanite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAegirine\" class=\"extiw\" title=\"en:Aegirine\">Aegirine\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRhodochrosite\" class=\"extiw\" title=\"en:Rhodochrosite\">Rhodochrosite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa> (FOV ~ 4+ cm wide)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada\u003C\u002Fdd>\n\u003Cdd>Thanks to Jean-Pierre Beckerich. MOB coll.\u003C\u002Fdd>\n\u003Cdd>A fragment of this specimen was XRD confirmed (as UK113) at the Canadian Museum of Nature. The color is distinctly yellowish. Out of view there is a great deal of unaltered petersenite-(Ce) (see child photo), but only a couple of terminated xls. Also out of view are \"beehives\" of tan\u002Fgray catapleiite with a bit of franconite in the interstices. Other specimens have (verified) franconite directly associated with the niveolanite. But here, most of the fuzzy white stuff is \"short hair\" niveolanite or (in very small amounts) dawsonite. This specimen came from the Poudrette pegmatite. Various child photos including closeups and stereo views. Oct 2009: I think I finally achieved reasonable color fidelity!\u003C\u002Fdd>\n\u003Cdd>Compare with the more typical snow white variety: \u003Ca href=\"\u002F\u002Fcommons.wikimedia.org\u002Fwiki\u002FFile:Niveolanite-257750.jpg\" title=\"File:Niveolanite-257750.jpg\">File:Niveolanite-257750.jpg\u003C\u002Fa>\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",795,{"id":638,"source_url":639,"license_code":562,"credit_html":640,"title":641,"description":642,"author":566,"original_width":643,"original_height":568},9377,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80401178","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=80401178\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Niveolanite, Franconite, Siderite, Aegirine, Microcline-262401.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNiveolanite\" class=\"extiw\" title=\"en:Niveolanite\">Niveolanite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFranconite\" class=\"extiw\" title=\"en:Franconite\">Franconite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAegirine\" class=\"extiw\" title=\"en:Aegirine\">Aegirine\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada\u003C\u002Fdd>\n\u003Cdd>FOV ~ 2.3 cm high. Via Jean-Pierre Beckerich. MOB coll. White fibers of niveolanite on olive siderite and white microcline with black aegirine. The fuzzy white stuff below the niveolanite is franconite.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",674,{"id":645,"source_url":646,"license_code":400,"credit_html":647,"title":648,"description":649,"author":404,"original_width":484,"original_height":650},16658,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10152383","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10152383\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Montgomeryite-Whitlockite-Microcline-179402.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMontgomeryite\" class=\"extiw\" title=\"en:Montgomeryite\">Montgomeryite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FWhitlockite\" class=\"extiw\" title=\"en:Whitlockite\">Whitlockite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Tip Top Mine (Tip Top pegmatite), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHenrietta_Marrie\" class=\"extiw\" title=\"en:Henrietta Marrie\">Fourmile\u003C\u002Fa>, Custer District, Custer County, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSouth_Dakota\" class=\"extiw\" title=\"en:South Dakota\">South Dakota\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-4122.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 12.3 x 4.6 x 4.6 cm.\u003C\u002Fdd>\n\u003Cdd>A fine cabinet specimen of rare phosphates from the famous Tip Top Mine of South Dakota. Light salmon-pink sprays of bladed montgomeryite are richly scattered and stand out on a large, well-formed microcline cleavage that is covered with drusy white whitlockite.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",355,{"id":652,"source_url":653,"license_code":400,"credit_html":654,"title":655,"description":649,"author":404,"original_width":458,"original_height":656},16659,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10152384","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10152384\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Montgomeryite-Whitlockite-Microcline-179403.jpg",434,{"id":658,"source_url":659,"license_code":562,"credit_html":660,"title":661,"description":662,"author":566,"original_width":663,"original_height":568},20549,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=12690935","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=12690935\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Birnessite, Rancieite, Aegirine, Opal, Microcline - Demix-Varennes quarry, Saint-Amable sill, Quebec, Canada.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBirnessite\" class=\"extiw\" title=\"en:Birnessite\">Birnessite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRancieite\" class=\"extiw\" title=\"en:Rancieite\">Rancieite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAegirine\" class=\"extiw\" title=\"en:Aegirine\">Aegirine\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa> (picture width: 4.7 x 6.8 mm)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada\u003C\u002Fdd>\n\u003Cdd>\u003Ci>Original description:\u003C\u002Fi> Pseudomorph of birnessite\u002Franciéite probably after serandite. (Thanks to Laszlo Horvath for information regarding the ranciéite.) The microcline is white. The olive green \"urchins\" are aegirine - very typical for STA. There are a few small colorless droplets of bright green fluorescent opal on the microcline.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",711,{"id":665,"source_url":666,"license_code":562,"credit_html":667,"title":668,"description":669,"author":670,"original_width":671,"original_height":672},28180,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32666509","Jyrki Autio, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32666509\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Wöhlerite, Amphibole Supergroup, Microcline-593206.jpg","Rainbow \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FW%C3%B6hlerite\" class=\"extiw\" title=\"en:Wöhlerite\">Wöhlerite\u003C\u002Fa>, Amphibole_Supergroup,_Microcline (Size: 90 mm x 75 mm x 45 mm)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Tuften (Tuften 1 Quarry; Tuften 2 Quarry), Tvedalen, Larvik, Vestfold, Norway\u003C\u002Fdd>\n\u003Cdd>Many 2-4 cm wöhlerites in black amphibole and white microcline matrix.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Jyrki Autio",960,768,{"id":674,"source_url":675,"license_code":562,"credit_html":676,"title":677,"description":678,"author":566,"original_width":679,"original_height":568},28520,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32681342","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32681342\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Yofortierite, Microcline-192645.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FYofortierite\" class=\"extiw\" title=\"en:Yofortierite\">Yofortierite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa> (FOV 6.9 x 4.3 mm)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality:  Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada\u003C\u002Fdd>\n\u003Cdd>The width of the yofortierite tuft is about 1 cm. Found June 1996. MOB coll. The white plates are microcline.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",989,{"id":681,"source_url":682,"license_code":400,"credit_html":683,"title":684,"description":685,"author":404,"original_width":686,"original_height":687},33624,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419665","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419665\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Arfvedsonite-Microcline-rw19a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArfvedsonite\" class=\"extiw\" title=\"en:Arfvedsonite\">Arfvedsonite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Hurricane Mt. localities, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FConway\" class=\"extiw\" title=\"en:Conway\">Conway\u003C\u002Fa>, Carroll 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-5942.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 4.9 x 3.7 x 1.7 cm\n\u003Cdl>\u003Cdt>Arfvedsonite, Microcline\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A stark matrix specimen hosting a 4.7-cm-long crystal of this rare species. For a US locale, it is extremely fine, and it is a well-balanced miniature as well. The matrix is crystallized microcline. Collected by Bob Whitmore in 1971. Ex. Robert Whitmore Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",581,800,{"id":689,"source_url":690,"license_code":562,"credit_html":691,"title":692,"description":693,"author":566,"original_width":568,"original_height":694},34156,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=25230272","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=25230272\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Astrophyllite, Eudialyte group, Microcline-168276.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAstrophyllite\" class=\"extiw\" title=\"en:Astrophyllite\">Astrophyllite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEudialyte\" class=\"extiw\" title=\"en:Eudialyte\">Eudialyte\u003C\u002Fa> group, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa> (FOV 3.6 x 2.5 mm)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality:  Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada\u003C\u002Fdd>\n\u003Cdd>Found June 2000. MOB coll.\u003C\u002Fdd>\n\u003Cdd>Everything has an indigo iridescent coating which is especially noticeable on the astrophyllite \"book\". This \"book\" habit, with individual astrophyllite \"pages\" joined at a common \"spine\" is common - even typical - at STA. The pink stuff (also coated) is probably plain eudialyte. The white plates are microcline. There are also few blades of dark green aegirine.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",717,{"id":696,"source_url":697,"license_code":400,"credit_html":698,"title":699,"description":700,"author":524,"original_width":526,"original_height":525},36968,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22559852","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22559852\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Brazilianite, microcline 1.JPG","crystal of brazilianite, crystals of feldspar var. microcline : Telírio claim, Linópolis, Divino das Laranjeiras, Doce valley, Minas Gerais, Brazil",{"id":702,"source_url":703,"license_code":400,"credit_html":704,"title":705,"description":706,"author":404,"original_width":458,"original_height":484},55208,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160172","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160172\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Londonite-Liddicoatite-Microcline-207511.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBorate_mineral\" class=\"extiw\" title=\"en:Borate mineral\">Londonite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FLiddicoatite\" class=\"extiw\" title=\"en:Liddicoatite\">Liddicoatite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Antsongombato gem mine, FKT Antsentsindrano, Andrembesoa Commune, Betafo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FVakinankaratra\" class=\"extiw\" title=\"en:Vakinankaratra\">Vakinankaratra Region\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAntananarivo_Province\" class=\"extiw\" title=\"en:Antananarivo Province\">Antananarivo Province\u003C\u002Fa>, Madagascar (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-2262.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 4.8 x 3.8 x 2.9 cm.\u003C\u002Fdd>\n\u003Cdd>A superb combination specimen that includes the very rare species, londonite, the cesium-dominant analogue of rhodizite. A gemmy and lustrous, 2.1 cm, sharp londonite crystal with vivid yellow color sits atop a beautifully contrasting, lustrous, cranberry-red liddicoatite crystal on microcline matrix. It is uncommon to see both londonite and liddicoatite in such richness together in a specimen.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",{"id":708,"source_url":709,"license_code":400,"credit_html":710,"title":711,"description":712,"author":404,"original_width":713,"original_height":714},60214,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10162206","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10162206\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Microcline-Albite-Pyrochlore-221139.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAlbite\" class=\"extiw\" title=\"en:Albite\">Albite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPyrochlore\" class=\"extiw\" title=\"en:Pyrochlore\">Pyrochlore\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Papachacra, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBel%C3%A9n_Department\" class=\"extiw\" title=\"en:Belén Department\">Belen Department\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCatamarca\" class=\"extiw\" title=\"en:Catamarca\">Catamarca\u003C\u002Fa>, Argentina (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-8381.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 6.0 x 4.5 x 4.0 cm.\u003C\u002Fdd>\n\u003Cdd>An aesthetic combination specimen from recent finds at Papachacra, Argentina. Sharp, off-white microcline crystals to 2.0 cm are scattered on the mounded matrix. The largest crystal is at the top. Pastel-blue albite crystals are richly sprinkled and epitactically grown on the microcline crystals. The real bonus on this piece, though, is the field of tiny, gemmy, octahedral pyrochlore crystals beautifully set on the lower left of the specimen (as identified for me by an Argentine native expert who has field collected here).\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",700,543,{"id":716,"source_url":717,"license_code":562,"credit_html":718,"title":719,"description":720,"author":566,"original_width":694,"original_height":568},86334,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32656873","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32656873\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Wöhlerite, Zircon, Natrolite, Microcline-282766.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FW%C3%B6hlerite\" class=\"extiw\" title=\"en:Wöhlerite\">Wöhlerite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FZircon\" class=\"extiw\" title=\"en:Zircon\">Zircon\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNatrolite\" class=\"extiw\" title=\"en:Natrolite\">Natrolite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa> (FOV 4.8 x 6.7 mm)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada\u003C\u002Fdd>\n\u003Cdd>\u003Ci>Original description:\u003C\u002Fi> Orange wöhlerite (partial xl) with tan zircon bi-pyramids and white \"natrolite\" on a bit of microcline. (The \"natrolite\" is falling apart and all or most of it is probably gonnardite.)\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",{"id":722,"source_url":723,"license_code":562,"credit_html":724,"title":725,"description":726,"author":566,"original_width":568,"original_height":727},86761,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32682002","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32682002\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Yofortierite, Eudialyte Group, Analcime, Microcline-254025.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FYofortierite\" class=\"extiw\" title=\"en:Yofortierite\">Yofortierite\u003C\u002Fa>, Eudialyte Group, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAnalcime\" class=\"extiw\" title=\"en:Analcime\">Analcime\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa> (FOV 6.9 x 4.3 mm)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada\u003C\u002Fdd>\n\u003Cdd>The yofortierite spans > 3 cm. This is a child photo. A somewhat broader view showing the nature of the environment.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",886,{"id":729,"source_url":730,"license_code":562,"credit_html":731,"title":732,"description":733,"author":566,"original_width":568,"original_height":734},86762,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32682006","Modris Baum, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32682006\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Yofortierite, Eudialyte Group, Analcime, Microcline-163592.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FYofortierite\" class=\"extiw\" title=\"en:Yofortierite\">Yofortierite\u003C\u002Fa>, Eudialyte Group, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAnalcime\" class=\"extiw\" title=\"en:Analcime\">Analcime\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMicrocline\" class=\"extiw\" title=\"en:Microcline\">Microcline\u003C\u002Fa> (FOV 6.9 x 4.3 mm)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada\u003C\u002Fdd>\n\u003Cdd>The yofortierite \"urchins\" span 3+ cm. Found Jun 1996. MOB coll.\u003C\u002Fdd>\n\u003Cdd>A very lucky find! The eudialyte group (most likely plain eudialyte) is \"shocking\" pink. The little plates are microcline. The analcime is the poorly formed blob on the left.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",806,[736,742,748,753,758],{"id":737,"url":738,"label":739,"formula":740,"spacegroup":741,"year":365},9349,"\u002Fcif\u002F9349.cif","Allan 1997","(K.986 Na.014) (Al1.03 Si2.97) O8","C -1",{"id":743,"url":744,"label":745,"formula":746,"spacegroup":741,"year":747},9355,"\u002Fcif\u002F9355.cif","Blasi 1987","(K.95 Na.05) Al Si3 O8",1987,{"id":749,"url":750,"label":751,"formula":752,"spacegroup":741,"year":348},9356,"\u002Fcif\u002F9356.cif","Griffen 1984","(Al Si3) (K.89 Na.11) O8",{"id":754,"url":755,"label":756,"formula":757,"spacegroup":741,"year":332},9357,"\u002Fcif\u002F9357.cif","Ribbe 1979","K (Si3 Al) O8",{"id":759,"url":760,"label":761,"formula":762,"spacegroup":741,"year":763},9358,"\u002Fcif\u002F9358.cif","Dal 1978","K.871 Na.12 Rb.008 (Al.94 Si3.06) O8",1978,[765,766],"Microline","Mikrokliner Felsit",[768,772,776,780,784,788,791,795,798,802,806,810,814,818,822,826,830,837,841,845,849,852,855,858,862,865,868,872,876,879,883,888,891,894,897,900,903,906,909,912,916,919,923,926,930,933,936,939,942],{"lang":769,"names":770},"af",[771],"Mikroklien",{"lang":773,"names":774},"ar",[775],"ميكروكلين",{"lang":777,"names":778},"az",[779],"Mikroklin",{"lang":781,"names":782},"be",[783],"Мікраклін",{"lang":785,"names":786},"ca",[787],"microclina",{"lang":789,"names":790},"cs",[779],{"lang":792,"names":793},"de",[794,779],"Grüner Feldspat",{"lang":796,"names":797},"es",[787],{"lang":799,"names":800},"et",[801],"mikrokliin",{"lang":803,"names":804},"eu",[805],"mikroklina",{"lang":807,"names":808},"fa",[809],"میکروکلین",{"lang":811,"names":812},"fi",[813],"Mikrokliini",{"lang":815,"names":816},"fr",[817],"microcline",{"lang":819,"names":820},"gl",[821],"Microclina",{"lang":823,"names":824},"he",[825],"מיקרוקלין",{"lang":827,"names":828},"it",[817,829],"microclino",{"lang":831,"names":832},"ja",[833,834,835,836],"マイクロクライン","マイクロクリン","微斜カリ長石","微斜長石",{"lang":838,"names":839},"ka",[840],"მიკროკლინი",{"lang":842,"names":843},"kk",[844],"Микроклин",{"lang":846,"names":847},"kk-arab",[848],"مىيكروكلىين",{"lang":850,"names":851},"kk-cn",[848],{"lang":853,"names":854},"kk-cyrl",[844],{"lang":856,"names":857},"kk-kz",[844],{"lang":859,"names":860},"kk-latn",[861],"Mïkroklïn",{"lang":863,"names":864},"kk-tr",[861],{"lang":866,"names":867},"ky",[844],{"lang":869,"names":870},"lt",[871],"Mikroklinas",{"lang":873,"names":874},"mk",[875],"микроклин",{"lang":877,"names":878},"mn",[844],{"lang":880,"names":881},"nb",[882],"mikroklin",{"lang":884,"names":885},"nl",[886,887],"Microclien","Microklien",{"lang":889,"names":890},"nn",[882],{"lang":892,"names":893},"pl",[779],{"lang":895,"names":896},"pt",[787],{"lang":898,"names":899},"ro",[817],{"lang":901,"names":902},"ru",[844],{"lang":904,"names":905},"sl",[882],{"lang":907,"names":908},"sr",[875],{"lang":910,"names":911},"sv",[779],{"lang":913,"names":914},"uk",[915],"мікроклін",{"lang":917,"names":918},"uz",[779],{"lang":920,"names":921},"vi",[922],"Microclin",{"lang":924,"names":925},"zh",[836],{"lang":927,"names":928},"zh-cn",[929],"微斜长石",{"lang":931,"names":932},"zh-hans",[929],{"lang":934,"names":935},"zh-hant",[836],{"lang":937,"names":938},"zh-hk",[836],{"lang":940,"names":941},"zh-sg",[929],{"lang":943,"names":944},"zh-tw",[836],"Q421841",{"history":947,"applications":951},{"markdown":948,"model_version":949,"prompt_version":950,"reviewed_at":11},"Long before microcline had a name, its most beautiful variety was already in use. Green beads of **amazonite** — a blue-green form of microcline — turn up in archaeological finds from Middle and New Kingdom Egypt and from Mesopotamia, evidence of jewellery making with the stone going back more than three thousand years[1]. Curiously, no ancient or medieval text describes the stone as a named material; it travelled across cultures as an object rather than as an entry in a mineralogical record[1].\n\nThe mineral itself was named only in 1830, by the German mineralogist Johann Friedrich August Breithaupt[2]. He drew the word from two Greek roots — *mikrós*, little, and *klínein*, to lean — to record a small but stubborn fact about its crystals. Their angles are *almost* right angles, but not quite. The departure from a perfect 90 degrees is too small to spot by eye and large enough to matter to a crystallographer[2]. Breithaupt applied the name to two Norwegian specimens. One was a reddish-brown feldspar from Arendal. The other showed a bluish schiller — a soft internal sheen — and came from Stavern, then known as Fredrichsvärn[2].\n\nFor decades after Breithaupt, the new mineral lived in the shadow of orthoclase, another potassium feldspar that microcline strongly resembles by eye. The two share a chemical formula (KAlSi₃O₈), a hardness, and almost the same density. The case for treating microcline as a distinct species was finally settled in 1876 by the French mineralogist Alfred Des Cloizeaux, working with a polarising microscope — an instrument that filters light to reveal a crystal's internal symmetry[3]. Under that filtered light, microcline shows a pattern that orthoclase never does. It is a fine cross-hatched mesh of repeated twins, called **tartan twinning** or **gridiron twinning**, produced by two twin laws acting at once — the albite law and the pericline law[3]. That plaid signature is still the diagnostic test for microcline in thin section[3].\n\n### The amazonite puzzle\n\nAmazonite kept one mystery for much longer. Its name comes from the Amazon River, after green stones once said to be traded out of the basin. No amazonite has ever been found there, and the stones the explorers brought back were almost certainly something else[4]. What gives amazonite its colour was unresolved until the late 20th century. A 1985 study tied the blue-green hue to traces of structural **lead** locked inside the feldspar, together with trapped water[5]. A 1998 theoretical study by A. Julg refined the model. It focused on how lead substituting for potassium alters the way the crystal absorbs light[5]. A 2010 study added a contributing role for divalent iron[5]. Three decades of work, to explain why a feldspar is green.","claude-opus-4-7","1.7.0",{"markdown":952,"model_version":949,"prompt_version":950,"reviewed_at":11},"Most of the world's microcline never leaves a factory floor. It is the potassium-rich workhorse of two giant industries — ceramics and glass — where it serves the same chemical purpose: a flux that lowers melting points and binds the rest of the recipe together when fired[1].\n\n### In ceramics and glass\n\nIn ceramic bodies, finely ground microcline melts before the clay and silica around it, then cools to a glassy phase that locks the grains in place[1]. The mineral is therefore a structural ingredient, not a coating — a tile, a basin, a porcelain cup all owe a share of their strength to feldspar fused inside them. The proportions vary by product. Tableware bodies typically run 15–30% feldspar; high-tension electrical porcelains 25–35%; sanitaryware around 25%; wall tile from 0–10%; and dental porcelain up to 80%[1].\n\nGlassmaking pulls on a different property of the same mineral. Microcline supplies the potassium-oxide flux (K₂O) that lowers melting points, and the alumina (Al₂O₃) that hardens the finished glass and slows its chemical attack[1].\\\nAbout two-thirds of all feldspar consumed in the United States goes to glass — bottles, jars, fibreglass insulation, container glass of every description[1].\n\n### Smaller uses\n\nCrushed microcline shows up in a more domestic register as the mild abrasive in scouring powders. The household cleaners **Bon Ami** and Bar Keepers Friend both use feldspar to give them their scrubbing action[1]. Microcline is hard enough to lift stains, soft enough not to scratch a porcelain sink.\n\nGeologists and archaeologists rely on microcline for a third reason: dating. A small fraction of its potassium atoms is a radioactive isotope that decays to argon at a known rate. A feldspar crystal locked inside a lava flow therefore records the age of the eruption. Microcline is one of the standard minerals for **potassium–argon** and **argon–argon** dating[1]. Its lattice also traps electrons in a way useful for luminescence dating of buried sediments[1].\n\nA green variety, **amazonite**, is cut and polished as a gemstone — usually as cabochons or beads for jewellery rather than as faceted stones[2].\n\nMicrocline also has a registered role as a food additive. In its powdered form, potassium aluminium silicate carries the European E-number **E555** and is used as an anti-caking agent[3]. The safety of the additive was reviewed by the European Food Safety Authority in 2008 and again in 2018[3]."]