Dioptase, Calcite
Thumbnail, 5.0 x 3.4 x 3.2 cm
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia

Dioptase, crowned by a fine crystal measuring 1.6 cm! Some of the crystals sit on a bed of bright dioptase microcrystals, others on the contrasting white calcite. 5 x 3.4 x 3.2 cm