Renierite

Renierite, (Cu,Zn)11(Ge,As)2Fe4S16 is a rare copper zinc germanium bearing sulfide mineral. It occurs at the Kipushi Mine, Congo; and Namibia, among other places.Renierite was named after Armand Renier, a Belgian geologist and Director of the Belgian Geological Survey.
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General Information:
 Chemical Formula:
(Cu,Zn)11(Ge,As)2Fe4S16
 Composition:
(Molecular Weight = 1,655.51 gm)
Zinc 21.72 % Zn
Iron 13.49 % Fe
Copper 24.95 % Cu
Germanium 6.58 % Ge
Arsenic 2.26 % As
Sulfur 30.99 % S 
 Empirical Formula:
Cu6.5Zn5.5Ge1.5As0.5Fe2+4S16
 Name Origin:
Named after the Belgian geologist, A. Renier.
Physical Properties:
 Cleavage:
None
 Color:
bronze yellow or pinkish brown.
 Density:
4.3
 Diaphaniety:
Opaque
 Habits:
Massive - Granular - Common texture observed in granite and other igneous rock., ,
 Hardness:
4-5 - Fluorite-Apatite
 Luster:
Metallic
 Streak:
blackish gray
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