Anilite

n. anility, poor body function due to old age

General Information:
 Chemical Formula:
Cu7S4
 Composition:
(Molecular Weight = 573.09 gm)
Copper 77.62 % Cu
Sulfur 22.38 % S 
 Empirical Formula:
Cu7S4
 IMA Status:
Approved IMA 1968
 Locality:
ANI MINE, AKITA,
Physical Properties:
 Cleavage:
None
 Color:
bluish gray.
 Density:
5.68
 Diaphaniety:
Opaque
 Hardness:
3-4 - Calcite-Fluorite
 Luminescence:
Non-fluorescent.
 Luster:
Metallic
 Streak:
black
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