Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.20-3.502.50-2.80
1
7.18
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Fracture
-
-
Cleavage
Indiscernible
Perfect
Mohs Hardness
6-75-6.5
2
10
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Chemical Composition
Ruby Zoisite: (Ca,Na)(Al,Mg,Fe)3Al6(BO3)3Si6O18(OH)4
Na 4(Al,Si) 12O 24Cl to Ca 4(Si,Al) 12O 24(CO 3,SO 4)Arthur Thomas , Gemstones (2009)