Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.63-3.92.98-3.10
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
Indistinct
[100] Perfect, [110] Good, [011] Distinct
Mohs Hardness
7.5-86
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references