Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
Very small mm crystals, also masses, dendritic aggregates to 1cm size and stalactites. Many specimens labelled from Tsumeb are more likely from other prolific localities; Abenab, Berg Aukas, Grootfontein, Guchab, Olifantsfontein and Uitsab, all within 100km of Tsumeb (Refs: MR-Tsumeb!).
Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia