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beryl |
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berylMineral that forms crystals chiefly in granite. It is the chief ore of beryllium. Two of its gem forms are aquamarine (light-blue crystals) and emerald (dark-green crystals).
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| Emeralds, for example, which are composed of beryllium aluminum silicate with a dash of chromium, are generated by a variety of geological recipes. Science, with its rational, analytical approach, informs us that aquamarine is beryllium aluminum silicate, a member of the beryl family, and that its siblings are emerald, golden beryl, morganite, heliodor, and goshenite. |
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