Dioptase with calcite and minrecordite - Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia (5.5×4cm).
Didier Descouens, CC BY-SA 3.0, via Wikimedia Commons. View source.
Dioptase with calcite and minrecordite - Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia (5.5×4cm).
Didier Descouens, CC BY-SA 3.0, via Wikimedia Commons. View source.