Iolite and Shigaite Physical Properties

Iolite

Shigaite

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1 Physical Properties

1.1 Tenacity

Not Available

Moderately ﬂexible

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.72.32

1 7.18

1.5 Fracture

Not Available

Flexible Flexible fragments.

1.6 Cleavage

3,1

Perfect on {0001}

1.7 Mohs Hardness

7-7.52

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Not Available

Iolite and Shigaite Chemical Formula

While comparing Iolite and Shigaite 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 Shigaite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Iolite and Shigaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Shigaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Shigaite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.32 whereas that of Shigaite is 2.32.