Conichalcite (w. calcite, cerussite and malachite)

calcite; cerussite; malachite

A thick, botryoidal crust of conichalcite (XRD indicated; Paul Carr, University of Wollongong, 2016) with sparse crystals of colourless cerussite (to 5 mm). On the reverse, sub-mm calcite rhombs and sub-mm malachite spherules are also associated.

The specimen was number 457 in the collection of Wilhelm Klein, production manager at Tsumeb between 1916 and 1939. His catalogue attributes it to 13 Level, towards the bottom of the first oxidation zone.