Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.72-2.752.6-3.3
1
7.18
👆🏻
Fracture
Uneven
Lamellar
Cleavage
Perfect on [001], good on [010], imperfect on [110]
Perfect 001
Mohs Hardness
6-6.52-2.5
2
10
👆🏻
Chemical Composition
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6