physical and chemical properties of ruby

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1.
Hardness
2.
CrystalSystem
3.
Luster
4.
Density
5.
Streak
6.
RefractiveIndex
7.
Birefringence
8.
Fracture
9.
Fluorescence
10.
Pleochroism
11.
ChemicalFormula
12.
Composition
13.
ChemicalResistance