Andalusite and Beryllonite Physical Properties

Andalusite

Beryllonite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.05-3.212.79-2.87

1 7.18

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Fracture

Uneven, Subconchoidal, Splintery

Conchoidal

Cleavage

Good on {110}, poor on {100}

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

Mohs Hardness

7.55.5-6

2 10

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Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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

Andalusite and Beryllonite Chemical Formula

While comparing Andalusite 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 Andalusite and Beryllonite chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Beryllonite- NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Brown Gemstones

Andalusite Vs Apatite

Andalusite Vs Apophyllite

Andalusite Vs Aragonite

Andalusite and Beryllonite Specific Gravity

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