Iolite and Sodalite Physical Properties

Iolite

Sodalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.72.15-2.40

1 7.18

1.5 Fracture

Not Available

Conchoidal, Uneven, UnevenArthur Thomas, Brittle

1.6 Cleavage

3,1

Poor on {110}

1.7 Mohs Hardness

7-7.55-6

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Na₈Al₆Si₆O₂₄Cl₂

Iolite and Sodalite Chemical Formula

While comparing Iolite and Sodalite 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 Sodalite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Sodalite- Na₈Al₆Si₆O₂₄Cl₂

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Iolite and Sodalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Sodalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Sodalite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.15-2.40 whereas that of Sodalite is 2.15-2.40.