Measurements: 47 x 28 x 27 mm
Description: Sparkling dioptase crystals (up to about 10 mm long) sit on a rock matrix, with bits of calcite.
Most of the crystals have minute to small nicks, and there is damage to the edges of the dioptase cluster.
Weight of Specimen: 34.6 g
Chemical Composition: Cu2+SiO2(OH)2 (dioptase) CaCO3 (calcite)
Hardness on Mohs
Location: Tsumeb, Northern Namibia.
Specimen Code: NTS 007
US $ 65.