Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.98-3.103.28-3.38
1
7.18
👆🏻
Fracture
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Splintery, Fibrous
Cleavage
[100] Perfect, [110] Good, [011] Distinct
Good on [110]
Mohs Hardness
66.5-7
2
10
👆🏻
Chemical Composition
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
NaAlSi 2O 6Ulrich Henn and Claudio C.