Chrysoberyl is beryllium aluminum oxide, BeAl2O4, an orthorhombic gemstone mineral with Mohs hardness 8.5 that includes Alexandrite and cat's-eye varieties. Explore its mineral science, name history, modern symbolic associations with...
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Beryl is a beryllium aluminum silicate mineral that forms hexagonal crystals and includes famous gem varieties such as Emerald, Aquamarine, Morganite, Heliodor and Goshenite. Explore its mineral science, history, modern...
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