Cordierite and Anorthite Physical Properties

Cordierite

Anorthite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.662.77

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

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

Perfect [001] good [010] poor [110]

1.7 Mohs Hardness

7-7.56-6.5

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Cordierite and Anorthite Chemical Formula

While comparing Cordierite and Anorthite 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 Anorthite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

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Cordierite Vs Rosasite

Cordierite and Anorthite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Anorthite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Anorthite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.77 whereas that of Anorthite is 2.77.