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Ruby and Andradite Physical Properties


Andradite and Ruby Physical Properties


Physical Properties

Tenacity
Brittle   
Brittle   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.97-4.05   
3.70-4.10   

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

Cleavage
No true cleavage   
none   

Mohs Hardness
9   
6.5-7   

Chemical Composition
Al 2 O 3   
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)   

Optical Properties >>
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Ruby and Andradite Chemical Formula

While comparing Ruby and Andradite 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 Andradite chemical formula.

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Ruby and Andradite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Andradite Optical Properties during the identification of gemstone. Specific gravity of Ruby is 3.70-4.10 whereas that of Andradite is 3.70-4.10.

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