Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.13-3.752.42-2.58
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
Conchoidal, Splintery, ConchoidalWalter Schumann
Cleavage
Poor on {100}
[010] perfect
Mohs Hardness
64-5
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ ) 9(SiO 4) 4(F,OH)) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
AlPO4 · 2(H2O)