Iolite and Steatite Physical Properties

Iolite

Steatite

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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

2.6-2.72.20-2.80

1 7.18

1.5 Fracture

Not Available

1.6 Cleavage

3,1

Not Available

1.7 Mohs Hardness

7-7.5Not Available

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Mg 3Si 4O 10(OH) 2Gemdat.org , Management Team (2012)

Iolite and Steatite Chemical Formula

While comparing Iolite and Steatite 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 Steatite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Steatite- Mg 3Si 4O 10(OH) 2Gemdat.org , Management Team (2012)

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Iolite and Steatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Steatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Steatite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.20-2.80 whereas that of Steatite is 2.20-2.80.