A purple variety of quartz that is a semi-precious gemstone and a member of the hexagonal crystal structure is called amethyst.

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The stunning green Moldavite has a varied history and a distinctive formation. Moldavite is a member of the tektite family of glass gemstones, which are created as a result of meteorite impacts. A mossy look and bubbles and swirls can be noticed in the Moldavite gemstone.

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