Iolite and Thulite Physical Properties

Iolite

Thulite

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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

2.6-2.73.1

1 7.18

1.5 Fracture

Not Available

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

3,1

Perfect {010} imperfect {100}

1.7 Mohs Hardness

7-7.56-7

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Ca₂Al₃(SiO₄)₃(OH)

Iolite and Thulite Chemical Formula

While comparing Iolite and Thulite 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 Thulite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Thulite- Ca₂Al₃(SiO₄)₃(OH)

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Iolite and Thulite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Thulite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Thulite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 3.1 whereas that of Thulite is 3.1.