Tenacity
-
Brittle
Solubility
-
insoluble
Durability
-
-
Specific Gravity
3.63-3.96.86-7.03
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
Indistinct
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
7.5-86-7
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references