Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.79-3.942.98-3.10
1
7.18
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Fracture
Lamellar, Splintery
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
{100} Good, {001} Good, {010} Poor
[100] Perfect, [110] Good, [011] Distinct
Mohs Hardness
46
2
10
👆🏻
Chemical Composition
FeAs
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references