Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.20-3.504.392
1
7.18
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Fracture
-
Conchoidal
Cleavage
Indiscernible
{010} moderate, {100} imperfect
Mohs Hardness
6-76.5-7
2
10
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Chemical Composition
Ruby Zoisite: (Ca,Na)(Al,Mg,Fe)3Al6(BO3)3Si6O18(OH)4
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)