Cordierite and Zinnwaldite Physical Properties

Cordierite

Zinnwaldite

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1 Physical Properties

1.1 Tenacity

Brittle

Elastic

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.662.9-3.1

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Uneven

1.6 Cleavage

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

Perfect basal {001}

1.7 Mohs Hardness

7-7.53.5-4.0

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

Not Available

Cordierite and Zinnwaldite Chemical Formula

While comparing Cordierite and Zinnwaldite 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 Zinnwaldite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18

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Cordierite and Zinnwaldite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Zinnwaldite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Zinnwaldite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.9-3.1 whereas that of Zinnwaldite is 2.9-3.1.