Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.20-3.502.72-2.75
1
7.18
👆🏻
Fracture
-
Uneven
Cleavage
Indiscernible
Perfect on [001], good on [010], imperfect on [110]
Mohs Hardness
6-76-6.5
2
10
👆🏻
Chemical Composition
Ruby Zoisite: (Ca,Na)(Al,Mg,Fe)3Al6(BO3)3Si6O18(OH)4
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)