General Information:
Chemical Formula:
(Zn,Fe++,Mn++)Mn++++3O7·3(H2O)
Locality:
Stirling Hill, near Ogdensburg, Sussex Co., New Jersey, USA.
Physical Properties:
Cleavage:
[???] Perfect
Color:
blue, bluish black, or black.
Density:
3.91
Diaphaniety:
Opaque
Habits:
Foliated - Two dimensional platy forms., Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite).,
Hardness:
2.5 - Finger Nail
Luminescence:
Non-fluorescent.
Luster:
Metallic
Streak:
brown
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