Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.20-3.502.98-3.10
1
7.18
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Fracture
-
Uneven, Conchoidal
Cleavage
Indiscernible
{100} Perfect, {110} Good, {011} Distinct
Mohs Hardness
6-75.5-6
2
10
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Chemical Composition
Ruby Zoisite: (Ca,Na)(Al,Mg,Fe)3Al6(BO3)3Si6O18(OH)4
LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references