Iolite and Variscite Physical Properties

Iolite

Variscite

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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

2.6-2.7

2.42-2.58

1.5 Fracture

Not Available

Conchoidal, Splintery, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

3,1

[010] perfect

1.7 Mohs Hardness

7-7.5

4-5

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

AlPO₄ · 2(H₂O)

Iolite and Variscite Chemical Formula

While comparing Iolite and Variscite 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 Variscite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Variscite- AlPO₄ · 2(H₂O)

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Iolite and Variscite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Variscite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Variscite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.42-2.58 whereas that of Variscite is 2.42-2.58.