Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.70-2.753.16-3.43
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
From the Greek for luster, for its pearly luster on the cleavage.
{110} Good, {110} Good
Mohs Hardness
4.5-55-6
2
10
👆🏻
Chemical Composition
Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)