Bismuthinite

sulphide

primary mineral

Formula: Bi2S3 sulphide
Specific gravity: 6.8 to 7.2
Hardness: 2
Streak: Grey
Colour: Lead grey to yellowish white
Solubility: Insoluble in hydrochloric acid and sulphuric acid; readily soluble in nitric acid
Environments:

Pegmatites
Metamorphic environments
Hydrothermal environments

Bismuthinite occurs as an unaltered primary mineral in hypothermal (high temperature) hydrothermal veins in tin and silver-cobalt deposits, and more rarely in contact metamorphic deposits and pegmatites.

Common impurities: Pb,Cu,Fe,As,Sb,Se,Te

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