Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.72-2.753.20-3.25
1
7.18
👆🏻
Fracture
Uneven
Uneven, Conchoidal
Cleavage
Perfect on [001], good on [010], imperfect on [110]
Good/distinct on [210]
Mohs Hardness
6-6.55.5
2
10
👆🏻
Chemical Composition
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Mg 2Si 2O 6Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references