Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.653.31
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven
Cleavage
Perfect on {001}, very good on {010}, imperfect on {110}
{110} Good
Mohs Hardness
6-6.55.5-6
2
10
👆🏻
Chemical Composition
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
(Fe2+ ,Mg)Al 2(PO 4) 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)