Iolite and Halite Physical Properties

Iolite

Halite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Water-soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.7

2.17

1.5 Fracture

Not Available

Conchoidal, Brittle, Metallic

1.6 Cleavage

3,1

Perfect {001}, three directions cubic

1.7 Mohs Hardness

7-7.5

2.0-2.5

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

NaCl

Iolite and Halite Chemical Formula

While comparing Iolite and Halite 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 Halite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Halite- NaCl

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Iolite and Halite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Halite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Halite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.17 whereas that of Halite is 2.17.