Erythrite and Cordierite Physical Properties

Erythrite

Cordierite

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1 Physical Properties

1.1 Tenacity

Sectile

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.062.57-2.66

1 7.18

1.5 Fracture

Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

Perfect on {010}; poor on {100} and { 1 02}.

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

1.7 Mohs Hardness

Not Available7-7.5

2 10

1.8 Chemical Composition

Co3(AsO4)2•8(H2O)

Mg2Al4Si5O18

Erythrite and Cordierite Chemical Formula

While comparing Erythrite 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 Erythrite and Cordierite chemical formula.

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

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Erythrite and Cordierite Specific Gravity

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