Composition: Cu31S16
Crystal System : Monoclinic
Colours: Grey, blackish-grey, black
Lustre : Metallic
Hardness (H) : 2.5-3.0
Specific Gravity (S.G) : 5.75
References: Gebhard (1999)


Very common. Widespread throughout the Tsumeb deposit, but generally as lamellar intergrowths with chalcocite, from which it is visually indistinguishable.


  • Hypogene
  • Supergene
  • 1st Oxidation Zone
  • 2nd Oxidation Zone
  • 3rd Oxidation Zone

Notable Finds

Excellent crystals of "chalcocite" found in the third oxidation zone, between 44 and 47 levels, are in fact a 50:50 mixture of chalcocite and djurleite (Gebhard, 1999).