Enargite
ID: 47
Enargite
Chemical Formula
Cu₃AsS₄
Hardness (Mohs)
3
Crystal System
Orthorhombic
Streak
black
Luster
Metallic
Diaphaneity
opaque
Color
Greyish-black to black, grey/rose-brown in reflected light.
Density
4.4 - 4.5
Fun Facts
Despite being an important copper ore, it's notable for containing arsenic, which makes it less desirable for some metallurgical processes due to toxicity concerns