Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3-3.152.98-3.10
1
7.18
👆🏻
Fracture
Conchoidal
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
Good on [110] and on [001]
[100] Perfect, [110] Good, [011] Distinct
Mohs Hardness
6.0-6.56
2
10
👆🏻
Chemical Composition
[ ]Na2(Mg3Al2)Si8O22(OH)2
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references