Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.20-3.504.32-4.48
1
7.18
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Fracture
-
Uneven, Subconchoidal, Conchoidal
Cleavage
Indiscernible
{101}, good; {010}, poor
Mohs Hardness
6-73.5
2
10
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Chemical Composition
Ruby Zoisite: (Ca,Na)(Al,Mg,Fe)3Al6(BO3)3Si6O18(OH)4
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)