Tsumeb is the TYPE LOCALITY of Ludlockite, a rare lead-iron arsenite that was first found in 1968 on the 30th level of Tsumeb, in its deepest oxidation zone filled with all kinds of bizarre (and apparently very cool) mineralogy. The hair-like crystals and deep, rich copper color are both visually stunning, and this freestanding cluster is quite beautiful. A terrific thumbnail.