Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.98-3.101.98-2.50
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
ConchoidalWalter Schumann
Cleavage
{100} Perfect, {110} Good, {011} Distinct
None
Mohs Hardness
5.5-65.5-6.5
2
10
👆🏻
Chemical Composition
LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)