Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.70-2.752.54-2.61
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
From the Greek for luster, for its pearly luster on the cleavage.
{001} Perfect, {010} Good
Mohs Hardness
4.5-56
2
10
👆🏻
Chemical Composition
Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)