Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.70-2.75-9999
1
7.18
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Fracture
Conchoidal
-
Cleavage
From the Greek for luster, for its pearly luster on the cleavage.
-
Mohs Hardness
4.5-5-9999
2
10
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Chemical Composition
Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
SiO2, Al2O3, CaO, MgO, FeO