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Cordierite
Cordierite

Erythrite
Erythrite



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Cordierite
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Erythrite

Cordierite and Erythrite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Sectile
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.57-2.663.06
Amber
1 7.18
1.5 Fracture
Subconchoidal, Conchoidal, Brittle
Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
1.6 Cleavage
Fair on {100}, poor on {001} and {010}
Perfect on {010}; poor on {100} and { 1 02}.
1.7 Mohs Hardness
7-7.5Not Available
Amber
2 10
1.8 Chemical Composition
Mg2Al4Si5O18
Co3(AsO4)2•8(H2O)

Cordierite and Erythrite Chemical Formula

While comparing Cordierite and Erythrite 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 Erythrite chemical formula.

  • Chemical formula of Cordierite- Mg2Al4Si5O18
  • Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)

Cordierite and Erythrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Erythrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Erythrite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.06 whereas that of Erythrite is 3.06.