Pyrochroite


Composition: Mn2+(OH)2
Crystal System : Trigonal
Colours: Bluish, greenish, brown, black
Lustre : Oily, waxy
Hardness : 2.5
Specific Gravity : 3.25

 

Distribution

Extremely rare. Questionable occurrence at Tsumeb.

Occurrence

  • Supergene

Paragenetic Notes

A specimen of pyrochroite (with reichenbachite) is in the collection of W. (Bill) Pinch. 

It apparently originated from Tsumeb mineralogist Bruno Geier, in 1964, and was subsequently in the collection of Georg Gebhard. 

Notwithstanding this provenance, it is notable that the occurrence of pyrochroite at Tsumeb is not recorded in the peer-reviewed literature.