Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
6.30-6.395.6-5.76
1
7.18
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Fracture
Conchoidal
Uneven
Cleavage
[001] good, [210] distinct
[001] perfect; [100] distinct
Mohs Hardness
3-3.52.5-3
2
10
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Chemical Composition
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)