Iolite and Chromite Physical Properties

Iolite

Chromite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.74.5-4.8

1 7.18

1.5 Fracture

Not Available

Uneven

1.6 Cleavage

3,1

None, parting may develop along {111}

1.7 Mohs Hardness

7-7.55.5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Fe++Cr2O4

Iolite and Chromite Chemical Formula

While comparing Iolite and Chromite 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 Chromite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Chromite- Fe++Cr2O4

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Iolite and Chromite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Chromite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Chromite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 4.5-4.8 whereas that of Chromite is 4.5-4.8.