Wulfenite (Black Wulfenite) – Tsumeb, Namibia
 
 So-called black wulfenite from the Tsumeb mine. The well terminated crystals appear black, but are brownish and stand out from the dark matrix in particular due to their strong luster. A richly occupied cluster with up to 1 cm large crystals,  from the famous Tsumeb mine. Specimens of this quality and size are extremely rare.