Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.353.50-3.60
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Perfect on {100}, imperfect on {001}
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
Mohs Hardness
2.56
2
10
👆🏻
Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.