The Turquoise Gemstone is the official stone for December and is also used to celebrate five years of marriage. Originally Persia was the most important source of Turquoise but is now virtually mined out; good sources of the stone are Afghanistan, Australia, Brazil, Chile, China, Mexico, Russia, Tanzania and Turkestan. The very best material at the moment comes from the Sleeping Beauty mine in Arizona.The color of Turquoise can range from a deep blue to blue/green a dark greeny blue to a yellowy green. Impurities present in the Gemstone give the Turquoise it's coloring, copper is responsible for it's blue toning while iron gives the stone a green tint.
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