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Ruby and Spinel Physical Properties


Spinel and Ruby Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
none   

Durability
Not Available   
Not Available   

Specific Gravity
3.97-4.05   
3.64-3.66   

Fracture
Conchoidal   
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)   

Cleavage
No true cleavage   
None, but may exhibit slight parting   

Mohs Hardness
9   
8   

Chemical Composition
Al 2 O 3   
MgAl2O4   

Optical Properties >>
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Ruby and Spinel Chemical Formula

While comparing Ruby and Spinel physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Ruby and Spinel chemical formula.

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Ruby and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Spinel Optical Properties during the identification of gemstone. Specific gravity of Ruby is 3.64-3.66 whereas that of Spinel is 3.64-3.66.

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