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Measurements: 22 x 21 x 13 mm Description: A small cluster of dioptase crystals with the largest crystal being 11 mm on edge. There is some damage to the sides of the specimen. Weight of Specimen: 7.2 g Chemical Composition: Cu2+SiO2(OH)2 Hardness on Mohs Scale: 5 Location: Congo, Africa. Specimen Code: VAR 019 US $ 80 . . .
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