General Information:
Chemical Formula:(Co,Ni)1-y(Mn++++O2)2-x(OH)2-2y+2x·n(H2O)
Environment:Residual deposits on weathered peridotite containing disseminated Co and Ni minerals.
Locality:New Caledonia.
Name Origin:Named from the Greek "to soil like soot".
Physical Properties: Color:black or brownish black.
Diaphaniety:Opaque
Habits:Massive - Uniformly indistinguishable crystals forming large masses., Botryoidal - "Grape-like" rounded forms (e.g.. malachite).,
Hardness:6 - Orthoclase
Luster:Earthy (Dull)
Streak:black
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