- Mottramite, Dioptase, Calcite
- Cabinet, 15.4 x 10.4 x 5.5 cm
- Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia
A large specimen of calcite richly covered with small green velvety clusters of mottramite, with a sprinkling of little deep green dioptase crystals. The overall contrast is very attractive. Ex. Rob Smith Collection.