Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.42-2.583.85-3.94
1
7.18
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Fracture
Conchoidal, Splintery, ConchoidalWalter Schumann
Conchoidal, Uneven
Cleavage
[010] perfect
{010} Good, {100} Distinct
Mohs Hardness
4-55-5.5
2
10
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Chemical Composition
AlPO4 · 2(H2O)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)