Sharp perfect single crystal of skinnerite, a rare copper antimony sulphide known from a few localities worldwide. From: Bankov, Košice, Košice County, Košice Region, Slovakia (Slovak Republic). Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY 4.0
Skinnerite
Skinnerite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Cu₃SbS₃.
It crystallizes in the monoclinic crystal system (space group P2_1/c).
Key properties: specific gravity 5.1; Metallic luster.
IMA symbol Ski, IMA status: approved, named in 1973.
Found in a complex of analcime-natrolite veins cutting naujaites (Ilı́maussaq intrusion, Greenland).
It is found associated with Sénarmontite, valentinite, tetrahedrite, antimony, chalcostibite, löllingite, galena, natrolite, analcime, ussingite, sodalite, feldspars, acmite.
In honor of Professor Brian John Skinner (1928–), Australian-American economic geologist, Yale University, New Haven, Connecticut, USA.