Kobellite

Pb₂₂Cu₄(Bi,Sb)₃₀S₆₉

Empiricial: Pb₂₂Cu₄Bi₂₅Sb₅S₆₉

A gray, fibrous, metallic mineral, a sulphide of antimony, bismuth, and lead. Named after Wolfgang Franz von Kobell (1803-1882), German mineralogist.

(Cu,Fe)2Pb12(Bi,Sb)14S35