Augite and Cordierite Physical Properties

Augite

Cordierite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.19-3.562.57-2.66

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

{110} Perfect, {010} Indistinct

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

1.7 Mohs Hardness

5.5-67-7.5

2 10

1.8 Chemical Composition

(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)

Mg2Al4Si5O18

Augite and Cordierite Chemical Formula

While comparing Augite and Cordierite 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 Augite and Cordierite chemical formula.

Chemical formula of Augite- (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Cordierite- Mg2Al4Si5O18

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Augite and Cordierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Augite and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Augite and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Augite is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.