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Almandine and Common Opal Physical Properties


Common Opal and Almandine Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.95-4.30   
1.98-2.50   

Fracture
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal   
Conchoidal, Conchoidal, Gemstones of the world (2001)   

Cleavage
none   
Not Available   

Mohs Hardness
7-7.5   
5.5-6.5   

Chemical Composition
Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)   
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)   

Optical Properties >>
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Almandine and Common Opal Chemical Formula

While comparing Almandine and Common Opal 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 Almandine and Common Opal chemical formula.

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Almandine and Common Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Almandine is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.

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Red Gemstones


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