Zinc-zippeite

General Information:
 Chemical Formula:
(Zn,Cu,Fe++)SO4·7(H2O)
 Composition:
(Molecular Weight = 286.05 gm)
Zinc 13.72 % Zn
Iron 1.95 % Fe
Copper 6.66 % Cu
Hydrogen 4.93 % H 
Sulfur 11.21 % S 
Oxygen 61.52 % O 
 Empirical Formula:
Zn0.6Cu0.3Fe2+0.1(SO4)·7(H2O)
Physical Properties:
 Cleavage:
[???] Perfect, [???] Distinct
 Color:
green, yellowish green, or apple green.
 Density:
2.02
 Diaphaniety:
Transparent to Translucent
 Hardness:
2 - Gypsum
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous (Glassy)
More details...