Bismuthinite Bismuth Specimen Russia Transbaikalia

Description BISMUTHINITE SPECIMEN This is the raw lead-gray bismuthinite specimen with feldspar. Dimensions: 2.0 x 1.6 x 1.0″ (5.2 x 4.1 x 2.5cm). Weight – 3.2oz (92 grams). Origin: Russia, Transbaikalia. Some information about bismuthinite: Bismuthinite is a mineral consisting of bismuth sulfide (Bi2S3). 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. It occurs in hydrothermal veins with tourmaline-bearing copper veins associated with granite, in some high temperature gold veins, and in recent volcanic exhalation deposits. It was first reported in 1832 from the mines of Potosí, Bolivia.