Iolite and Augelite Physical Properties

Iolite

Augelite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.72.70-2.75

1 7.18

1.5 Fracture

Not Available

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

3,1

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

1.7 Mohs Hardness

7-7.54.5-5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

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

Iolite and Augelite Chemical Formula

While comparing Iolite 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 Iolite and Augelite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Augelite- Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

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Iolite and Augelite Specific Gravity

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