Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.642.98-3.10
1
7.18
👆🏻
Fracture
Conchoidal
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
Indiscernible
[100] Perfect, [110] Good, [011] Distinct
Mohs Hardness
6.5-76
2
10
👆🏻
Chemical Composition
SiO2
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references