Iolite and Sylvite Physical Properties

Iolite

Sylvite

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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

2.6-2.7

1.993

1.5 Fracture

Not Available

Uneven, Brittle

1.6 Cleavage

3,1

Perfect on [100], [010], [001]

1.7 Mohs Hardness

7-7.5

2.5

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Not Available

Iolite and Sylvite Chemical Formula

While comparing Iolite and Sylvite 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 Sylvite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Iolite and Sylvite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 1.993 whereas that of Sylvite is 1.993.