Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.63-3.93.20-3.25
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven, Conchoidal
Cleavage
Indistinct
Good/distinct on [210]
Mohs Hardness
7.5-85.5
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references
Mg 2Si 2O 6Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references