Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.773.85-3.94
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, Uneven
Cleavage
Perfect [001] good [010] poor [110]
{010} Good, {100} Distinct
Mohs Hardness
6-6.55-5.5
2
10
👆🏻
Chemical Composition
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)