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Sapphire and Cordierite Physical Properties


Cordierite and Sapphire Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
insoluble   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.95-4.03   
2.57-2.66   

Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)   
Subconchoidal, Conchoidal, Brittle   

Cleavage
None, but may exhibit parting   
Fair on {100}, poor on {001} and {010}   

Mohs Hardness
9   
7-7.5   

Chemical Composition
Al 2 O 3   
Mg2Al4Si5O18   

Optical Properties >>
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Sapphire and Cordierite Chemical Formula

While comparing Sapphire and Cordierite 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 Sapphire and Cordierite chemical formula.

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Sapphire and Cordierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sapphire and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.

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