Chalcopyrite

Name:
Chalcopyrite
Detailed information:

Chemistry name:	copper pyrites; yellow copper
M Formula:	CuFeS2
Properties:
Yellow or bronze iridescent crystals with metallic luster and greenish streak. D 4.1–4.3, Mohs hardness 3.5–4. May carry gold or silver or mechanically intermixed pyrite.
Occurrence:
Montana, Utah, Arizona, Tennessee, Wisconsin, Europe, Chile, Canada.
Use:
Important ore of copper, semiconductor research.