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The '''sapphire''' is one of the 4 "[[precious stone]]s" (along with [[diamond]], [[emerald]], and [[ruby]]) that are considered among the most valuable of gemstones. Sapphires are found in shades of blue. Many are transparant. Many sapphires come from [[India]], as well as [[Thailand]], [[Sri Lanka]], and [[Myanmar]]. They are also found in parts of [[Australia]], and a variety with a distinct color have been found in [[Montana]], in the United States. The sapphire is the birthstone for September. Interestingly, both sapphire and ruby are the same material, corundum, (an aluminum oxide, Al2O3).[http://www.emporia.edu/earthsci/amber/go340/corundum.htm]

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[[Category:minerals]]

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[[Category:Gems]]

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[[Category:Birthstones]]

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