Lautenthalite

General Information:
 Chemical Formula:
PbCu++4(OH)6(SO4)2·3(H2O)
 Composition:
(Molecular Weight = 809.60 gm)
Copper 31.40 % Cu
Hydrogen 1.49 % H 
Lead 25.59 % Pb
Sulfur 7.92 % S 
Oxygen 33.60 % O 
 Empirical Formula:
PbCu4(OH)6(SO4)2·3(H2O)
 IMA Status:
Approved IMA
Physical Properties:
 Cleavage:
[???] Good
 Color:
blue green, green, or greenish blue.
 Diaphaniety:
Transparent
 Hardness:
2.5 - Finger Nail
 Luster:
Vitreous (Glassy)
 Streak:
white
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