Heterogenite
Formula: Co3+O(OH)
Species: Oxides
Lustre: Vitreous, Dull
Hardness: 3 – 5
Specific Gravity: 4.13 – 4.47
Crystal System: Hexagonal
Name: From the Greek for “of another kind”, as the mineral differs in composition from similar minerals.
Type Locality: Wolfgang Maaßen mines, Schneeberg, Erzgebirgskreis, Saxony – Germany