cuprite (v. chalcotrichite, w. calcite and dolomite)

Tightly intergrown mats of bright red acicular cuprite crystals, the variety known as chalcotrichite, on a cavernous matrix of creamy-white dolomite with later crystals of colourless-white calcite.

This is specimen number 807 from the collection of Wilhelm Klein and his catalogue confirms that it was collected from 12 Level East in the first oxidation zone. Klein was a senior manager at Tsumeb between 1916 and 1939. Exhibit 2 shows the reverse of the specimen.

calcite; dolomite