Stibnite

Name:
Stibnite
Detailed information:

Chemistry name:	gray antimony; antimony glance; antimonite
M Formula:	Sb2S3
Properties:
Lead-gray mineral, subject to blackish tarnish, metallic luster. D 4.52–4.62, Mohs hardness 2. Soluble in concentrated boiling hydrochloric acid with evolution of hydrogen sulfide.
Occurrence:
Japan, China, Mexico, Bolivia, Peru, South Africa.
Use:
The most important ore of antimony.