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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