Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.502.72-2.75
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven
Cleavage
Distinct on {100} and {110}
Perfect on [001], good on [010], imperfect on [110]
Mohs Hardness
5.5-66-6.5
2
10
👆🏻
Chemical Composition
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)