Tenacity
-
-
Solubility
-
Partly soluble in HCl.
Durability
-
-
Specific Gravity
5.353.32-3.43
1
7.18
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Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on {100}, imperfect on {001}
{100} perfect; {110} and {1 1 0} good; {010} poor
Mohs Hardness
2.55.5-6
2
10
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Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references