Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.72-2.754.95-5.0
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
Perfect on [001], good on [010], imperfect on [110]
Imperfect to indistinct on {10 1 0}, parting on {0001}
Mohs Hardness
6-6.54-5
2
10
👆🏻
Chemical Composition
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references