Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.63-3.93.05-3.21
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven, Subconchoidal, Splintery
Cleavage
Indistinct
Good on {110}, poor on {100}
Mohs Hardness
7.5-87.5
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references