Cordierite and Riebeckite Physical Properties

Cordierite

Riebeckite

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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

2.57-2.663.28-3.44

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Uneven, Splintery, Brittle

1.6 Cleavage

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

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}

1.7 Mohs Hardness

7-7.55.0-6.0

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

Not Available

Cordierite and Riebeckite Chemical Formula

While comparing Cordierite and Riebeckite 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 Riebeckite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18

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Cordierite and Riebeckite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.