ID: 82
Chemical Formula
CuFeSâ‚‚
Hardness (Mohs)
3.5-4
Crystal System
Tetragonal
Streak
black
Luster
Metallic
Diaphaneity
Opaque
Color
Yellow
Chalcopyrite is often called "fool's gold" due to its similar appearance to pyrite, but it's much softer and has a greener streak!
