Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.352.60-2.65
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
Perfect on {100}, imperfect on {001}
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
2.56-6.5
2
10
👆🏻
Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)