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Date: 2012-12-26 03:53:51 Crystallography Superhard materials Oxide minerals Transparent materials Diamond Ruby Chrysoberyl Opal Argyle diamond mine Gemstones Chemistry Matter		1 TheAustralianGemmologist Author and Subject Add to Reading List Source URL: www.gem.org.au Download Document from Source Website File Size: 312,71 KB Share Document on Facebook

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