Sardonyx and Andradite Physical Properties

Sardonyx

Andradite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.703.70-4.10

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

none

1.7 Mohs Hardness

6.5-76.5-7

2 10

1.8 Chemical Composition

SiO 2Ulrich Henn and Claudio C.

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

Sardonyx and Andradite Chemical Formula

While comparing Sardonyx 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 Sardonyx and Andradite chemical formula.

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

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Sardonyx and Andradite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sardonyx and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sardonyx and Andradite Optical Properties during the identification of gemstone. Specific gravity of Sardonyx is 3.70-4.10 whereas that of Andradite is 3.70-4.10.