Description
BISMUTHINITE CRYSTAL
This is the lead gray bismuthinite crystal. Dimensions: 2.1 x 0.5 x 0.2″ (5.4 x 1.2 x 0.6cm). Weight – 0.6oz (16 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.
