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Gemstones of the World, 5E Subclass_Wildlife Death-Cast calls Mateo Torrez andThis definitive guide takes the mystery out of appreciating, buying and selling gemstones. It covers everything from the romance and history of more than 1,800 gemstones to their geographic locations; scientific, physical and colour properties; and the way they are formed, structured and mined. The book also fully covers the optical features of gems light and colour, luminescence, refraction and inclusions and key information about the densities and