Bertrandite and Cordierite Physical Properties

Bertrandite

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

2.59-2.602.57-2.66

1 7.18

1.5 Fracture

Brittle, Metallic, Brittle, Metallic

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

{001} Perfect, {110} Distinct, {101} Distinct

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

1.7 Mohs Hardness

6-77-7.5

2 10

1.8 Chemical Composition

Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

Mg2Al4Si5O18

Bertrandite and Cordierite Chemical Formula

While comparing Bertrandite 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 Bertrandite and Cordierite chemical formula.

Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Cordierite- Mg2Al4Si5O18

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Bertrandite and Cordierite Specific Gravity

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