Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.63-3.93.95-4.10
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven
Cleavage
Indistinct
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
7.5-83.5-4
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references