Tenacity
Sectile
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
6.131.98-2.50
1
7.18
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Fracture
Conchoidal
ConchoidalWalter Schumann
Cleavage
Distinct on {001} and {110}, indistinct on {100}
None
Mohs Hardness
2-35.5-6.5
2
10
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Chemical Composition
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)