Bismuthinite Bismuth Specimen Russian Stone Gemstone Mineral

Description BISMUTHINITE SPECIMEN This is the raw lead gray bismuthinite specimen. Dimensions: 2.8 x 2.1 x 1.3″ (7.1 x 5.4 x 3.2cm). Weight – 5.9oz (166 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 scratched with a fingernail and rather dense. Bismuthinite 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.