Description
BISMUTHINITE SPECIMEN
This is the raw lead gray bismuthinite specimen with tourmaline, feldspar and quartz. Dimensions: 3.0 x 2.0 x 1.5″ (7.7 x 5 x 3.7cm). Weight – 4.7oz (132 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.
