Cordierite and Sardonyx Physical Properties

Cordierite

Sardonyx

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.662.55-2.70

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Not Available

1.6 Cleavage

Fair on {100}, poor on {001} and {010}

Not Available

1.7 Mohs Hardness

7-7.56.5-7

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

SiO 2Ulrich Henn and Claudio C.

Cordierite and Sardonyx Chemical Formula

While comparing Cordierite 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 Cordierite and Sardonyx chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Sardonyx- SiO 2Ulrich Henn and Claudio C.

Compare Blue Gemstones

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Cordierite and Sardonyx Specific Gravity

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