Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.773.05-3.08
1
7.18
👆🏻
Fracture
Uneven
Subconchoidal, Uneven, Conchoidal
Cleavage
Perfect [001] good [010] poor [110]
Poor on {100}
Mohs Hardness
6-6.55
2
10
👆🏻
Chemical Composition
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)