Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.95-4.103.13-3.75
1
7.18
👆🏻
Fracture
Uneven
Subconchoidal, Uneven, Conchoidal
Cleavage
None
Poor on {100}
Mohs Hardness
-99996
2
10
👆🏻
Chemical Composition
Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe2+ ) 9(SiO 4) 4(F,OH)) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references