Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.352.79-2.87
1
7.18
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Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on {100}, imperfect on {001}
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
Mohs Hardness
2.55.5-6
2
10
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Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references