Reinerite

General Information:
 Chemical Formula:
Zn3(As+++O3)2
 Composition:
(Molecular Weight = 442.01 gm)
Zinc 44.38 % Zn
Arsenic 33.90 % As
Oxygen 21.72 % O 
 Empirical Formula:
Zn3(AsO3)2
Physical Properties:
 Cleavage:
[110] Good, [011] Good, [111] Good
 Color:
blue or light yellow green.
 Density:
4.27
 Hardness:
5-5.5 - Apatite-Knife Blade
 Luster:
Vitreous - Adamantine
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