Measurements: 30 x 26 x 21 mm
Description: Small, gemmy dioptase crystal on a bed of calcite (mostly crystals) which, in turn, sit on a dolomite (or calcite) matrix. The specimen has quite a few nicks.
Weight of Specimen: 17.8 g
Chemical Composition: Cu2+SiO2(OH)2 (dioptase) CaCO3 (calcite)
Hardness on Mohs
Location: Tsumeb, Northern Namibia.
Specimen Code: NTS 003
US $ 30.