Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.40-3.582.60-2.65
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven, Conchoidal
Cleavage
{010} Perfect
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
7.56-6.5
2
10
👆🏻
Chemical Composition
(Al,Mg) 8(Al,Si) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)