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auction king
auction king

auction king

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Emerald is a gemstone, and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium and sometimes vanadium....read more

auction king

Emerald is a gemstone, and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium and sometimes vanadium. 2 Beryl has a hardness of 7.5–8 on the 10-point Mohs scale of mineral hardness. 2

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