Emerald is the most famous member of the beryl family. Legends endowed the wearer with the ability to foresee the future when emerald was placed under the tongue, as well as to reveal truth and be ...
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IFLScience on MSNWhat Is The Rarest Gemstone?The world's rarest gemstone is made of kyawthuite ... heating and cooling that cooks up the rare gems we humans consider ...
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