Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.20-3.503.30-3.50
1
7.18
👆🏻
Fracture
-
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Indiscernible
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
6-75
2
10
👆🏻
Chemical Composition
Ruby Zoisite: (Ca,Na)(Al,Mg,Fe)3Al6(BO3)3Si6O18(OH)4
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references