Cordierite and Chromite Physical Properties

Cordierite

Chromite

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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

2.57-2.664.5-4.8

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Uneven

1.6 Cleavage

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

None, parting may develop along {111}

1.7 Mohs Hardness

7-7.55.5

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

Fe++Cr2O4

Cordierite and Chromite Chemical Formula

While comparing Cordierite and Chromite 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 Chromite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Chromite- Fe++Cr2O4

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Cordierite and Chromite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Chromite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Chromite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 4.5-4.8 whereas that of Chromite is 4.5-4.8.