Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.845.35
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Conchoidal
Cleavage
{0001} good, {10 1 0} parting
Perfect on {100}, imperfect on {001}
Mohs Hardness
7.5-82.5
2
10
👆🏻
Chemical Composition
(Ca,Ce)(Al,Ti,Mg)12O19
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)