Cordierite and Augite Physical Properties

Cordierite

Augite

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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

2.57-2.663.19-3.56

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

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

1.6 Cleavage

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

{110} Perfect, {010} Indistinct

1.7 Mohs Hardness

7-7.55.5-6

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

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

Cordierite and Augite Chemical Formula

While comparing Cordierite and Augite 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 Augite chemical formula.

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

Compare Blue Gemstones

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Cordierite Vs Rosasite

Cordierite Vs Riebeckite

Cordierite and Augite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Augite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Augite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.19-3.56 whereas that of Augite is 3.19-3.56.