Tenacity
Sectile
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
6.132.57-2.66
1
7.18
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Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
Distinct on {001} and {110}, indistinct on {100}
Fair on {100}, poor on {001} and {010}
Mohs Hardness
2-37-7.5
2
10
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Chemical Composition
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Mg2Al4Si5O18