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Almandine and Rock Crystal Physical Properties


Rock Crystal 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   
2.65   

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

Cleavage
none   
Not Available   

Mohs Hardness
7-7.5   
7   

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

Optical Properties >>
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Almandine and Rock Crystal Chemical Formula

While comparing Almandine and Rock Crystal 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 Rock Crystal chemical formula.

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Almandine and Rock Crystal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Rock Crystal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Rock Crystal Optical Properties during the identification of gemstone. Specific gravity of Almandine is 2.65 whereas that of Rock Crystal is 2.65.

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