Bismuthinite is a mineral consisting of bismuth sulfide (Bi 3). It is an important ore for bismuth. The crystals are steel-grey to off-white with a metallic luster. It is soft enough to be scratched with a fingernail and rather dense.
Bismuthinite forms a series with the lead, copper, bismuth mineral aikinite
It occurs in hydrothermal with tourmaline -bearing copper veins associated with granite veins, and in recent volcanic exhalation deposits. Associated minerals include native bismuth, aikinite, arsenopyrite , galena, tourmaline, wolframite
It was first reported in 1832 from the mines of Potosí , Bolivia