Apophyllite and Iolite Physical Properties

Apophyllite

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

2.30-2.502.6-2.7

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009)

Not Available

1.6 Cleavage

Perfect on (001)

3,1

1.7 Mohs Hardness

4.5-57-7.5

2 10

1.8 Chemical Composition

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Mg₂Al₄Si₅O₁₈

Apophyllite and Iolite Chemical Formula

While comparing Apophyllite 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 Apophyllite and Iolite chemical formula.

Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Apophyllite and Iolite Specific Gravity

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