Corkite


Composition: PbFe3+3(SO4)(PO4)(OH)6
Crystal System : Trigonal
Colours: Brown, yellowish-brown, pale-yellow, yellow-green, dark-green
Lustre : Vitreous, sub-vitreous, resinous, waxy, greasy
Hardness (H) : 3.5-4.5
Specific Gravity (S.G) : 4.30
References: Gebhard (1999)

Distribution

Extremely rare.

Occurrence

  • Supergene

Paragenetic and General Notes

Resembles the pseudocubic habit of beudantite, but as smaller "cubes". Extremely rare, consistent with the broader defficiency of phosphate at Tsumeb.