Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
-99992.98-3.10
1
7.18
👆🏻
Fracture
-
Uneven, Conchoidal
Cleavage
-
{100} Perfect, {110} Good, {011} Distinct
Mohs Hardness
-99995.5-6
2
10
👆🏻
Chemical Composition
SiO2, Al2O3, CaO, MgO, FeO
LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references