Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.43-3.442.72-2.75
1
7.18
👆🏻
Fracture
-
Uneven
Cleavage
None Observed
Perfect on [001], good on [010], imperfect on [110]
Mohs Hardness
6.5-76-6.5
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)