Black wulfenite on tennantite matrix – Tsumeb Mine, Otavi Uplands, Oshikoto, Namibia
 The rare black wulfenites stand out from the tennantite matrix with their high luster. The wulfenites, up to 1 cm in size, crystallize with sharp edges.
 Rare collector's item from the famous and now extinct Tsumeb Mine in Namibia