Tenacity
Brittle
Sectile
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.656.13
1
7.18
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Fracture
Conchoidal, ConchoidalWalter Schumann
Conchoidal
Cleavage
3,1
Distinct on {001} and {110}, indistinct on {100}
Mohs Hardness
72-3
2
10
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Chemical Composition
SiO 2Ulrich Henn and Claudio C.
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references