Cordierite and Apophyllite Physical Properties

Cordierite

Apophyllite

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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

2.57-2.662.30-2.50

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Uneven, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

Perfect on (001)

1.7 Mohs Hardness

7-7.54.5-5

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

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

Cordierite and Apophyllite Chemical Formula

While comparing Cordierite and Apophyllite 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 Apophyllite chemical formula.

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

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Cordierite and Apophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Apophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Apophyllite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.30-2.50 whereas that of Apophyllite is 2.30-2.50.