Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.353.16-3.43
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
Perfect on {100}, imperfect on {001}
{110} Good, {110} Good
Mohs Hardness
2.55-6
2
10
👆🏻
Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)