Fornacite


Composition: Pb2Cu(CrO4)(AsO4)(OH)

Crystal System : Monoclinic
Colours: Olive-green
Hardness (H) : 2-3
Specific Gravity (S.G) : 6.27

 

Distribution

Extremely rare. Questionable status at Tsumeb.

Paragenetic and General Notes

Mindat lists fornacite as a "believed valid" species at Tsumeb (http://www.mindat.org/locentry-62727.html, retrieved 02/02/2016).  

No description is provided, but the reference is accompanied by a "Mineralogical Record, in press" citation.