Cobaltite
ID: 46
Cobaltite
Chemical Formula
CoAsS
Hardness (Mohs)
5.5
Crystal System
Orthorhombic
Streak
Grayish black
Luster
Metallic
Diaphaneity
Opaque
Color
Reddish silver white, violet steel gray, or black.
Fun Facts
It's a key source of cobalt, a critical metal used in high-strength alloys and rechargeable batteries. Tenacity: Brittle.