Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.98-3.103-3.15
1
7.18
👆🏻
Fracture
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Conchoidal
Cleavage
[100] Perfect, [110] Good, [011] Distinct
Good on [110] and on [001]
Mohs Hardness
66.0-6.5
2
10
👆🏻
Chemical Composition
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
[ ]Na2(Mg3Al2)Si8O22(OH)2