Brochantite

Brochantite


Composition: Cu2+4(SO4)(OH)6
Crystal System : Monoclinic
Colours: Green, emerald-green, green-black, bluish-green
Lustre : Vitreous
Hardness (H) : 3.5-4.0
Specific Gravity (S.G) : 3.97
References: Gebhard (1999)

Distribution

Common. First oxidation zone, upper levels.

Occurrence

  • Supergene
  • 1st Oxidation Zone

Notable Finds

Crystals to 40 mm in length penetrating white anglesite crystals; pyramidal crystals to 5 mm diameter. (Gebhard, 1999)

Paragenetic and General Notes

According to Gebhard (op.cit.) all brochantite specimens are from between surface and 130 m depth. 

Brochantite has been reported to form pseudomorphs after the following minerals: azurite (rare); gypsum (rare).