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Date: 2012-08-29 04:18:39Gemstones Beryllium minerals Chrysoberyl Pleochroism Vanadium Crystal twinning Emerald Crystal Phlogopite Chemistry Matter Crystallography | 73 Book Reviews Russian Alexandrites By Karl SchmetzerAdd to Reading ListSource URL: www.gem.org.auDownload Document from Source WebsiteFile Size: 105,16 KBShare Document on Facebook |