Tenacity
-
Tough
Solubility
-
-
Durability
-
-
Specific Gravity
2.98-3.102.78-2.85
1
7.18
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Fracture
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Uneven
Cleavage
[100] Perfect, [110] Good, [011] Distinct
Perfect basal (001)
Mohs Hardness
62-2.5
2
10
👆🏻
Chemical Composition
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
KMg3(Si3Al)O10(F,OH)2