Bismuthinite

Name:
Bismuthinite
Detailed information:

M Formula:	Bi2S3
Properties:
Lead-gray mineral, often with yellow tarnish; metallic luster. Contains 81.2% bismuth, 18.8% sulfur, soluble in nitric acid, d 6.4–6.5, Mohs hardness 2.
Occurrence:
Utah, Bolivia, Mexico.
Use:
Ore of bismuth.