Dumortierite and Beryllonite Physical Properties

Dumortierite

Beryllonite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.26-3.412.79-2.87

1 7.18

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Fracture

Fibrous, ConchoidalWalter Schumann

Conchoidal

Cleavage

Distinct on {100}, poor on {110}; parting on {001}

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

Mohs Hardness

7-8.55.5-6

2 10

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Chemical Composition

AlAl₆O₃BSi₃O₁₈

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

Dumortierite and Beryllonite Chemical Formula

While comparing Dumortierite 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 Dumortierite and Beryllonite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Beryllonite- NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Dumortierite and Beryllonite Specific Gravity

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