Cordierite and Albite Physical Properties

Cordierite

Albite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.57-2.662.60-2.65

1 7.18

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Fracture

Subconchoidal, Conchoidal

Uneven, Conchoidal

Cleavage

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

Perfect on {001}, very good on {010}, imperfect on {110}

Mohs Hardness

7-7.56-6.5

2 10

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Chemical Composition

Mg2Al4Si5O18

NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Cordierite and Albite Chemical Formula

While comparing Cordierite and Albite 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 Albite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Albite- NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

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Cordierite Vs Riebeckite

Cordierite Vs Rosasite

Cordierite and Albite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Albite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Albite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.60-2.65 whereas that of Albite is 2.60-2.65.