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Cordierite
Cordierite

Realgar
Realgar



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Cordierite
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Realgar

Cordierite and Realgar Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.57-2.663.56
Amber
1 7.18
1.5 Fracture
Subconchoidal, Conchoidal, Brittle
(e.g. graphite).
1.6 Cleavage
Fair on {100}, poor on {001} and {010}
{010} Good
1.7 Mohs Hardness
7-7.5Not Available
Amber
2 10
1.8 Chemical Composition
Mg2Al4Si5O18
AsSMichael O’Donoghue , Gems, Sixth Edition (2006)

Cordierite and Realgar Chemical Formula

While comparing Cordierite and Realgar 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 Cordierite and Realgar chemical formula.

  • Chemical formula of Cordierite- Mg2Al4Si5O18
  • Chemical formula of Realgar- AsSMichael O’Donoghue , Gems, Sixth Edition (2006)

Cordierite and Realgar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Realgar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Realgar Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.56 whereas that of Realgar is 3.56.