Eriochalcite

General Information:
 Chemical Formula:
CuCl2·2(H2O)
 Composition:
(Molecular Weight = 170.48 gm)
Copper 37.27 % Cu
Hydrogen 2.36 % H 
Chlorine 41.59 % Cl
Oxygen 18.77 % O 
 Empirical Formula:
CuCl2·2(H2O)
Physical Properties:
 Cleavage:
[110] Perfect, [001] Good
 Color:
blue green or green blue.
 Density:
2.47
 Diaphaniety:
Transparent
 Hardness:
2.5 - Finger Nail
 Luster:
Vitreous (Glassy)
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