Zoisite and Augite Physical Properties

Zoisite

Augite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.20-3.503.19-3.56

1 7.18

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Fracture

Uneven, Conchoidal, Even

Uneven, Conchoidal

Cleavage

Perfect {010} imperfect {100}

{110} Perfect, {010} Indistinct

Mohs Hardness

6-75.5-6

2 10

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Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

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

Zoisite and Augite Chemical Formula

While comparing Zoisite 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 Zoisite and Augite chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Augite- (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)

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Zoisite and Augite Specific Gravity

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