Kobellite Locality: Deer Park Mine, Rossland, Trail Creek Mining Division, British Columbia, Canada Original description: A 4.2 by 2.8 cms matrix piece with areas of massive metallic steel grey Kobellite and some Chalcopyrite. JSS specimen and photo. Ex Bart Cannon specimen. — Photo: John Sobolewski (JSS) · CC BY 3.0
Kobellite
A gray fibrous lead-copper-bismuth-antimony sulfosalt of the izoklakeite-berryite series.
Intro adapted from Wikipedia (CC BY-SA).
Kobellite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Pb₁₁(Cu,Fe)₂(Bi,Sb)₁₅S₃₅.
It crystallizes in the monoclinic crystal system (space group Pnnm). It is a member of the Kobellite structural group.
Key properties: Mohs hardness 2.5–3; specific gravity 6.48; Black streak; Metallic luster.
IMA symbol Kbl, grandfathered status — known before the IMA’s founding, named in 1841.
A high-temperature hydrothermal mineral.
It is found associated with Cobaltite, arsenopyrite, chalcopyrite (Vena mines, Sweden); bismuthinite, jamesonite, tetrahedrite (Raleigh, North Carolina, USA).
In honor of Wolfgang Franz von Kobell (1803–1882), German mineralogist.