Phlogopite and Iolite Physical Properties

Phlogopite

Iolite

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.78-2.852.6-2.7

1 7.18

1.5 Fracture

None, Uneven

Not Available

1.6 Cleavage

Perfect basal (001)

3,1

1.7 Mohs Hardness

2-2.57-7.5

2 10

1.8 Chemical Composition

Not Available

Mg₂Al₄Si₅O₁₈

Phlogopite and Iolite Chemical Formula

While comparing Phlogopite 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 Phlogopite and Iolite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Phlogopite and Iolite Specific Gravity

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