Description
BISMUTHINITE CRYSTALS
This is the cluster of lead gray bismuthinite crystals with tourmaline and feldspar. Dimensions: 2.4 x 1.8 x 1.5″ (6 x 4.5 x 3.7cm). Weight – 5.7oz (163 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 (More information about bismuthinite).
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