Apophyllite and Cordierite Physical Properties

Apophyllite

Cordierite

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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

2.30-2.502.57-2.66

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009)

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

Perfect on (001)

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

1.7 Mohs Hardness

4.5-57-7.5

2 10

1.8 Chemical Composition

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Mg2Al4Si5O18

Apophyllite and Cordierite Chemical Formula

While comparing Apophyllite and Cordierite 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 Apophyllite and Cordierite chemical formula.

Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
Chemical formula of Cordierite- Mg2Al4Si5O18

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Apophyllite and Cordierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apophyllite and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apophyllite and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Apophyllite is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.