Roxbyite


Composition: Cu9S5
Crystal System : Triclinic
Colours: Blue-black
Lustre : Metallic
Hardness (H) : 2.5
Specific Gravity (S.G) : 5.56
References:

Blass et al. (2009)

Distribution

Rare, (though possibly widespread as microscopic intergrowths with chalcocite).

Occurrence

  • Hypogene