Emplectite

General Information:
 Chemical Formula:
CuBiS2
 Composition:
(Molecular Weight = 336.66 gm)
Copper 18.88 % Cu
Bismuth 62.07 % Bi
Sulfur 19.05 % S 
 Empirical Formula:
CuBiS2
 Locality:
Czechoslovakia at Schlaggenwald, Bohemia.
 Name Origin:
From the Greek emplektos, "interwoven."
Physical Properties:
 Cleavage:
[001] Perfect
 Color:
gray, grayish yellow, silver white, or tin white.
 Density:
6.3 - 6.5, Average = 6.4
 Diaphaniety:
Opaque
 Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Granular - Generally occurs as anhedral to subhedral crystals in matrix., Massive - Fibrous - Distinctly fibrous fi ne-grained forms.
 Hardness:
2 - Gypsum
 Luminescence:
Non-fluorescent.
 Luster:
Metallic
 Streak:
black
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emplectite
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