Dioptase on Calcite - Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia More info: https://www.irocks.com/minerals/specimen/52806 One of Tsumeb's iconic or signature combinations, Dioptase on Calcite; and these have a distinct and dramatic beauty all their own. One basis for this wonderful aesthetic is the sheer contrast between the two species. Dioptase, a hydrous copper silicate, is known for its glassy, emerald-green crystals that can exhibit flashes of green fire when illuminated just right. Her

Dioptase and Calcite - Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia More info: https://www.irocks.com/minerals/specimen/51089 Here is a very attractive, sparkling Dioptase miniature from Tsumeb (mid-1980s era finds) composed of lustrous, deep-green Dioptase crystals on white Calcite. There is good isolation between the Dioptase crystals that range between 1 and 6 mm, in general, however, there are two prominent, larger, richly colored colored crystals measuring 1 and 1.7 cm, respectively on opp