Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.13-3.753.95-4.10
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
Uneven
Cleavage
Poor on {100}
None
Mohs Hardness
6-9999
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ ) 9(SiO 4) 4(F,OH)) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)