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Sofus S Michelsen,rough diamonds,diamond cutting,rough diamond evaluation,Michelsen Gemstone Index,The Art of Diamond Cutting,diamond cuttering,diamond mining,West Africa,Gemologist,certified master cutter,geologist,gemstone evalution,The Diamond Ins...
Language: English Owner: The Diamond Institute Backlinks: 5 Page Rank: 3 Last Checked: 04/08/2013