Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.082.77
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
Uneven
Cleavage
Poor on {100}
Perfect [001] good [010] poor [110]
Mohs Hardness
56-6.5
2
10
👆🏻
Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)