Obsidian and Iolite Physical Properties

Obsidian

Iolite

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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

2.35-2.602.6-2.7

1 7.18

1.5 Fracture

Conchoidal, ConchoidalWalter Schumann, Conchoidal

Not Available

1.6 Cleavage

Not Available

3,1

1.7 Mohs Hardness

5-5.57-7.5

2 10

1.8 Chemical Composition

Not Available

Mg₂Al₄Si₅O₁₈

Obsidian and Iolite Chemical Formula

While comparing Obsidian 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 Obsidian and Iolite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Obsidian and Iolite Specific Gravity

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