Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.942.70-2.75
1
7.18
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Fracture
Conchoidal, Uneven
Conchoidal
Cleavage
{010} Good, {100} Distinct
From the Greek for luster, for its pearly luster on the cleavage.
Mohs Hardness
5-5.54.5-5
2
10
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Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)