Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.353.05-3.21
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Subconchoidal, Splintery
Cleavage
Perfect on {100}, imperfect on {001}
Good on {110}, poor on {100}
Mohs Hardness
2.57.5
2
10
👆🏻
Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references