Chlorastrolite and Iolite Physical Properties

Chlorastrolite

Iolite

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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

3.1-3.52.6-2.7

1 7.18

1.5 Fracture

Granular

Not Available

1.6 Cleavage

Not Available

3,1

1.7 Mohs Hardness

5-67-7.5

2 10

1.8 Chemical Composition

Ca 2(Mg,Fe)Al 2(SiO 4)(Si 2O 7)(OH) 2 · H 2O)Arthur Thomas , Gemstones (2009)

Mg₂Al₄Si₅O₁₈

Chlorastrolite and Iolite Chemical Formula

While comparing Chlorastrolite and Iolite 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 Chlorastrolite and Iolite chemical formula.

Chemical formula of Chlorastrolite- Ca 2(Mg,Fe)Al 2(SiO 4)(Si 2O 7)(OH) 2 · H 2O)Arthur Thomas , Gemstones (2009)
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Chlorastrolite and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chlorastrolite and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chlorastrolite and Iolite Optical Properties during the identification of gemstone. Specific gravity of Chlorastrolite is 2.6-2.7 whereas that of Iolite is 2.6-2.7.