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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