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Dioptase is an emerald-green copper silicate mineral known for its gemstone qualities. Although not rare, large clean dioptase crystals over 1 carat suitable for faceting are rare due to inclusions and cleavage planes. Dioptase is sometimes faceted or made into cabochons but needs protective settings due to its softness and perfect cleavage. Notable sources of dioptase include Tsumeb, Namibia and Altyn-Tyube, Kazakhstan.

Author

asset68

Language

EN