Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.98-3.032.72-2.75
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
[110] perfect; [010] distinct
Perfect on [001], good on [010], imperfect on [110]
Mohs Hardness
5-66-6.5
2
10
👆🏻
Chemical Composition
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)