Iolite and Boulder Opal Physical Properties

Iolite

Boulder 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

2.6-2.71.98-2.25

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

3,1

Not Available

1.7 Mohs Hardness

7-7.55-6.5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

SiO 2 + H 2OUlrich Henn and Claudio C.

Iolite and Boulder Opal Chemical Formula

While comparing Iolite and Boulder 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 Boulder Opal chemical formula.

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

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Iolite and Boulder Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Boulder Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Boulder Opal Optical Properties during the identification of gemstone. Specific gravity of Iolite is 1.98-2.25 whereas that of Boulder Opal is 1.98-2.25.