Apophyllite KF and Cordierite Physical Properties

Apophyllite KF

Cordierite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.33-2.372.57-2.66

1 7.18

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Fracture

Uneven

Subconchoidal, Conchoidal

Cleavage

Perfect on {001}, imperfect on {110}

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

Mohs Hardness

4.5-57-7.5

2 10

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Chemical Composition

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

Mg2Al4Si5O18

Apophyllite KF and Cordierite Chemical Formula

While comparing Apophyllite KF 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 KF and Cordierite chemical formula.

Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)
Chemical formula of Cordierite- Mg2Al4Si5O18

Compare Green Gemstones

Apophyllite KF Vs Nepouite

Apophyllite KF Vs Phlogopite

Apophyllite KF Vs Prismatine

Apophyllite KF and Cordierite Specific Gravity

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