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Poudrette quarry, established in 1959, and from 1992 to 2007, the enlarged Poudrette quarry, which incorporates the former Demix and all other previously operated quarries into a single entity. The Poudrette quarry is one the world's great mineralogical treasures, and the type locality for 73 mineral species. The Poudrette family has contributed greatly to the mineralogical studies of Mont Saint-Hilaire by generously allowing access to their quarry.","2025-08-11 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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",45.5627778,-73.1416667,"Canada",4,[265,268,271,275],{"id":266,"year":11,"html":267,"doi":11},15968931,"Gems & Gemology, Spring 2003: 24-31.",{"id":269,"year":28,"html":270,"doi":11},16772656,"Grice, Joel D., Ercit, T. Scott, Van Velthuizen, Jerry, Dunn, Pete J. (1987) Poudretteite, KNa\u003Csub>2\u003C\u002Fsub>B\u003Csub>3\u003C\u002Fsub>Si\u003Csub>12\u003C\u002Fsub>O\u003Csub>30\u003C\u002Fsub>, a new member of the osumilite group from Mont Saint-Hilaire, Quebec, and its crystal structure. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  25 (4) 763-766 \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Frruff_1.0\u002Fuploads\u002FCM25_763.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":272,"year":273,"html":274,"doi":11},15418311,1996,"Grew, Edward S.; Anovitz, Lawrence M. - \u003Ci>Eds.\u003C\u002Fi> (1996) Boron - Mineralogy, Petrology and Geochemistry. \u003Ci>Reviews in Mineralogy\u003C\u002Fi> Vol. 33. Mineralogical Society of America p.862",{"id":276,"year":277,"html":278,"doi":11},16966801,2001,"(2001) Poudretteite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fpoudretteite.pdf' class='refpdflink'>\u003C\u002Fa>",[280,290,300,309,315],{"id":281,"source_url":282,"license_code":283,"credit_html":284,"title":285,"description":286,"author":287,"original_width":288,"original_height":289},19894,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=37684176","CC BY-SA 3.0","DonGuennie|G-Empire The World Of Gems, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=37684176\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poudretteit-G-EmpireTheWorldOfGems.jpg","Poudretteit, 0.51ct, Mogok Myanmar","DonGuennie|G-Empire The World Of Gems",283,211,{"id":291,"source_url":292,"license_code":293,"credit_html":294,"title":295,"description":296,"author":297,"original_width":298,"original_height":299},75199,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=99541892","CC0 1.0","لا يوجد, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=99541892\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","أكبر حجر بودرتيت في العالم.jpg","أكبر حجر بودرتيت في العالم","لا يوجد",400,278,{"id":301,"source_url":302,"license_code":283,"credit_html":303,"title":304,"description":305,"author":306,"original_width":307,"original_height":308},19895,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=38846495","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=38846495\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poudretteite-382457.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoudretteite\" class=\"extiw\" title=\"en:Poudretteite\">Poudretteite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Mogok Township, Pyin-Oo-Lwin District, Mandalay Division, Burma (Myanmar)\u003C\u002Fdd>\n\u003Cdd>Size: 0.9 cm x 0.6 cm x 0.5 cm\u003C\u002Fdd>\n\u003Cdd>An exquisite gem crystal of an extreme rarity. Formerly known only from micros from Poudrette Quarry in Canada, a few small pockets of this material have now turned up in the Mogok Gem Tract. This is an extraordinary crystal for its form, good termination, and lavender color. In person, it is more gemmy. Joe Budd photos.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",768,873,{"id":310,"source_url":311,"license_code":283,"credit_html":312,"title":313,"description":305,"author":306,"original_width":307,"original_height":314},19896,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=38846497","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=38846497\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poudretteite-382458.jpg",802,{"id":316,"source_url":317,"license_code":293,"credit_html":318,"title":319,"description":320,"author":321,"original_width":322,"original_height":323},19898,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=175177806","Ken Larsen, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=175177806\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cutted Poudretteite from the National Museum of Natural History.jpg","Cutted 9.41 ct Poudretteite Gem. Procedent from Myanmar, Stored in the National Museum of Natural History","Ken Larsen",3072,2048,[325],{"id":326,"url":327,"label":328,"formula":329,"spacegroup":330,"year":28},11464,"\u002Fcif\u002F11464.cif","Grice 1987","K Na2 B3 Si12 O30","P 6\u002Fm c c",[332,333],"IMA1986-028","Poudretteiet",[335,340,344,348,353,357,361,365,370],{"lang":336,"names":337},"ar",[338,339],"بودرتيت","بودرتيت (حجر)",{"lang":341,"names":342},"bg",[343],"Пудретеит",{"lang":345,"names":346},"ca",[347],"poudretteïta",{"lang":349,"names":350},"de",[351,352],"IMA 1986-028","Poudretteit",{"lang":354,"names":355},"eu",[356],"Poudretteita",{"lang":358,"names":359},"fr",[360],"poudretteïte",{"lang":362,"names":363},"it",[364],"poudretteite",{"lang":366,"names":367},"ja",[368,369],"プドレット石","ポードレッタイト",{"lang":371,"names":372},"pl",[373],"poudretteit","Q3909587",{"history":11,"applications":11}]