General Information:
Chemical Formula:
4(Fe,Cu)S·3(Mg,Al)(OH)2
Physical Properties:
Cleavage:
[???] Perfect
Color:
bronze or gray.
Density:
3.09 - 3.14, Average = 3.11
Diaphaniety:
Opaque
Hardness:
1-1.5 - Talc or a little harder
Luster:
Metallic
More details...