Obsidian and Cordierite Physical Properties

Obsidian

Cordierite

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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

2.35-2.602.57-2.66

1 7.18

1.5 Fracture

Conchoidal, ConchoidalWalter Schumann, Conchoidal

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

Not Available

Fair on {100}, poor on {001} and {010}

1.7 Mohs Hardness

5-5.57-7.5

2 10

1.8 Chemical Composition

Not Available

Mg2Al4Si5O18

Obsidian and Cordierite Chemical Formula

While comparing Obsidian and Cordierite 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 Cordierite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18

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Obsidian and Cordierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Obsidian and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Obsidian and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Obsidian is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.