Cordierite and Beryllonite Physical Properties

Cordierite

Beryllonite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.662.79-2.87

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

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

{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces

1.7 Mohs Hardness

7-7.55.5-6

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Cordierite and Beryllonite Chemical Formula

While comparing Cordierite and Beryllonite 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 Beryllonite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Beryllonite- NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Cordierite and Beryllonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Beryllonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Beryllonite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.79-2.87 whereas that of Beryllonite is 2.79-2.87.