Iolite and Bertrandite Physical Properties

Iolite

Bertrandite

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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

2.6-2.72.59-2.60

1 7.18

1.5 Fracture

Not Available

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

3,1

{001} Perfect, {110} Distinct, {101} Distinct

1.7 Mohs Hardness

7-7.56-7

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

Iolite and Bertrandite Chemical Formula

While comparing Iolite and Bertrandite 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 Bertrandite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

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Iolite and Bertrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Bertrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Bertrandite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.59-2.60 whereas that of Bertrandite is 2.59-2.60.