Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.70-2.753.25
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
From the Greek for luster, for its pearly luster on the cleavage.
Imperfect in one direction
Mohs Hardness
4.5-55-5.5
2
10
👆🏻
Chemical Composition
Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)