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It costs from about 2.5 to 20 thousand dollars per gram, or from 500 to 4 thousand per carat. Taaffeite is a jewel of purple color said to be a million times rarer than diamonds. Because of its extreme rarity it is used only as a gemstone. Taaffeite is a very rare mineral , a complex of oxide (hydroxide), magnesium, beryllium and aluminum, which is close to the spinel and difficult distinguishable from it...
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