Augite and Dumortierite Physical Properties

Augite

Dumortierite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.19-3.563.26-3.41

1 7.18

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Fracture

Uneven, Conchoidal

Fibrous, ConchoidalWalter Schumann

Cleavage

{110} Perfect, {010} Indistinct

Distinct on {100}, poor on {110}; parting on {001}

Mohs Hardness

5.5-67-8.5

2 10

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Chemical Composition

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

AlAl₆O₃BSi₃O₁₈

Augite and Dumortierite Chemical Formula

While comparing Augite and Dumortierite 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 Dumortierite 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 Dumortierite- AlAl₆O₃BSi₃O₁₈

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Augite and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Augite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Augite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Augite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.