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Sapphire
Sapphire

Andradite
Andradite



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Sapphire
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Andradite

Sapphire and Andradite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
insoluble
-
3.95-4.03
Uneven
None, but may exhibit parting
9
Al 2 O 3
 
Brittle
-
-
3.70-4.10
Conchoidal, Uneven
none
6.5-7
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Sapphire and Andradite Chemical Formula

While comparing Sapphire 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 Sapphire and Andradite chemical formula.

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Sapphire and Andradite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sapphire and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire Vs Andradite during the identification of gemstone. Specific gravity of Sapphire is whereas that of Andradite is .