Tennantite


Composition: Cu6[Cu4(Fe,Zn)2](As,Sb)4S13
Crystal System : Cubic
Lustre : Metallic
Hardness : 4
Specific Gravity : 4.6-4.7
References: Pohwat (2009)

Occurrence

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

Notable Finds

The famous Klein/Kegel collection tennantite in the Smithsonian (# NMNH R8534) with crystals to 185 mm was collected from 6 Level in the first oxidation zone. Most tennantite specimens have somewhat dull, corroded faces, but lustrous metallic crystals to 15 mm were found in the first oxidation zone - again, on 6 Level (Von Bezing, 2007). In the third oxidation zone, on 45 Level, crystals to 30 mm with a good metallic lustre and associated with quartz were recovered.