Cordierite and Sunstone Physical Properties

Cordierite

Sunstone

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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

2.57-2.662.62-2.65

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Gemstones of the world (2001)

1.6 Cleavage

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

001

1.7 Mohs Hardness

7-7.56

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

Cordierite and Sunstone Chemical Formula

While comparing Cordierite and Sunstone 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 Sunstone chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Sunstone- Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

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Cordierite and Sunstone Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Sunstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Sunstone Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.62-2.65 whereas that of Sunstone is 2.62-2.65.