Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.72-2.753.91-4.73
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
Perfect on [001], good on [010], imperfect on [110]
None
Mohs Hardness
6-6.56.5-7.5
2
10
👆🏻
Chemical Composition
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
ZrSiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)