Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.30-2.602.60-2.65
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven, Conchoidal
Cleavage
{111} Imperfect
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
5.5-66-6.5
2
10
👆🏻
Chemical Composition
Na 4AlBeSi 4O 12ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)