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Sapphire and Pyrope Physical Properties


Pyrope and Sapphire Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
insoluble   
insoluble in water   

Durability
Not Available   
Not Available   

Specific Gravity
3.95-4.03   
3.62-3.87   

Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)   
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle   

Cleavage
None, but may exhibit parting   
None   

Mohs Hardness
9   
7-7.5   

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

Optical Properties >>
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Sapphire and Pyrope Chemical Formula

While comparing Sapphire and Pyrope 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 Pyrope chemical formula.

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Sapphire and Pyrope Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sapphire and Pyrope Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Pyrope Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 3.62-3.87 whereas that of Pyrope is 3.62-3.87.

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