Eugenite


Composition:

Ag11Hg2

Crystal System : Cubic
Colours: Yellowish-silver
Lustre : Metallic
Hardness (H) : 2.5-3.0

 

Distribution

Very rare. Third oxidation zone, associated with silver amalgam.

Occurrence

  • Supergene
  • 3rd Oxidation Zone

Paragenetic and General Notes

Silver amalgam, containing c. 25% mercury, occurs on 44 Level, in the third oxidation zone, where it is intimately intergrown with cuprite and associated with calcite, and malachite. XRD indicates that eugenite (or a phase with a very similar structure) is present in the silver-amalgam