Almandine and Sardonyx Physical Properties

Almandine

Sardonyx

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.30

2.55-2.70

1.5 Fracture

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Not Available

1.6 Cleavage

none

Not Available

1.7 Mohs Hardness

7-7.5

6.5-7

1.8 Chemical Composition

Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

SiO 2Ulrich Henn and Claudio C.

Almandine and Sardonyx Chemical Formula

While comparing Almandine and Sardonyx 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 Sardonyx chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Sardonyx- SiO 2Ulrich Henn and Claudio C.

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Almandine and Sardonyx Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Sardonyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Sardonyx Optical Properties during the identification of gemstone. Specific gravity of Almandine is 2.55-2.70 whereas that of Sardonyx is 2.55-2.70.