Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.352.72-2.75
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Perfect on {100}, imperfect on {001}
Perfect on [001], 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)
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)