Zoisite and Augelite Physical Properties

Zoisite

Augelite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.20-3.502.70-2.75

1 7.18

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Fracture

Uneven, Conchoidal, Even

Conchoidal

Cleavage

Perfect {010} imperfect {100}

From the Greek for luster, for its pearly luster on the cleavage.

Mohs Hardness

6-74.5-5

2 10

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Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

Zoisite and Augelite Chemical Formula

While comparing Zoisite and Augelite 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 Augelite chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Augelite- Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

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Zoisite and Augelite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zoisite and Augelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Augelite Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 2.70-2.75 whereas that of Augelite is 2.70-2.75.