Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.653.43-3.44
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
-
Cleavage
Perfect on {001}, very good on {010}, imperfect on {110}
None Observed
Mohs Hardness
6-6.56.5-7
2
10
👆🏻
Chemical Composition
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references