Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.6-5.766.50-7.00
1
7.18
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Fracture
Uneven
Irregular, Conchoidal
Cleavage
[001] perfect; [100] distinct
On {011}, distinct; on {001}, {013}, indistinct
Mohs Hardness
2.5-33
2
10
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Chemical Composition
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
PbMoO 4Walter Schumann , Gemstones of the world (2001)