Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.55-2.672.98-3.10
1
7.18
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Fracture
-
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
-
[100] Perfect, [110] Good, [011] Distinct
Mohs Hardness
5.5-66
2
10
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Chemical Composition
Na, K, Ca, H, O, Si, Al
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references