Iolite and Crystal Opal Physical Properties

Iolite

Crystal Opal

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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

2.6-2.71.97-2.22

1 7.18

1.5 Fracture

Not Available

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

3,1

Not Available

1.7 Mohs Hardness

7-7.55.5-6.5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

SiO 2 + H 2OUlrich Henn and Claudio C.

Iolite and Crystal Opal Chemical Formula

While comparing Iolite and Crystal Opal 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 Crystal Opal chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Iolite and Crystal Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Crystal Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Crystal Opal Optical Properties during the identification of gemstone. Specific gravity of Iolite is 1.97-2.22 whereas that of Crystal Opal is 1.97-2.22.