Calcite from Tsumeb, Oshikoto Region, Namibia

Calcite ps. Cerussite with Dioptase

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia

7.7 x 3.9 x 3.6 cm

Sharp, angular matrix specimen coated in a drusy crust of white calcite

pseudomorph after an earlier generation of cerussite, retaining that species’ blocky, faceted crystallization pattern. A fine, even dusting of pale mint-green dioptase micro-crystals covers the ridgelines and high points of the crust, concentrated along the edges. Crisp geometric form with subtle, well-distributed color contrast.