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The Probert Encyclopaedia of Rocks & Minerals

DIOPTASE

Picture of Dioptase

Dioptase is a bright-green silicate of copper and is found in the oxidation zone of copper deposits and in cavities of massive copper minerals. It resembles emerald in appearance, but has the formulae CuSiO2(OH)2 and a relative hardness of 5.
Research Dioptase

 
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