Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.722.72-2.75
1
7.18
👆🏻
Fracture
-
Uneven
Cleavage
{110} Perfect, {010} Perfect
Perfect on [001], good on [010], imperfect on [110]
Mohs Hardness
5-66-6.5
2
10
👆🏻
Chemical Composition
Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)