Cryolite and Iolite Physical Properties

Cryolite

Iolite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.972.6-2.7

1 7.18

1.5 Fracture

Uneven

Not Available

1.6 Cleavage

None observed

3,1

1.7 Mohs Hardness

2.57-7.5

2 10

1.8 Chemical Composition

Na 3AlF 6Ulrich Henn and Claudio C.

Mg₂Al₄Si₅O₁₈

Cryolite and Iolite Chemical Formula

While comparing Cryolite 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 Cryolite and Iolite chemical formula.

Chemical formula of Cryolite- Na 3AlF 6Ulrich Henn and Claudio C.
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Cryolite and Iolite Specific Gravity

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