Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.6-5.765.50-5.90
1
7.18
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Fracture
Uneven
Conchoidal
Cleavage
[001] perfect; [100] distinct
On {10 1 0}, perfect; parting on {000 1 }
Mohs Hardness
2.5-34
2
10
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Chemical Composition
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)