Beryl and Andalusite Physical Properties

Beryl

Andalusite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.60-2.903.05-3.21

1 7.18

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Fracture

Uneven, Conchoidal, Irregular

Uneven, Subconchoidal, Splintery

Cleavage

Imperfect on {0001}

Good on {110}, poor on {100}

Mohs Hardness

7.5-87.5

2 10

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Chemical Composition

Be₃Al₂Si₆O₁₈

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

Beryl and Andalusite Chemical Formula

While comparing Beryl and Andalusite 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 Beryl and Andalusite chemical formula.

Chemical formula of Beryl- Be₃Al₂Si₆O₁₈
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Beryl and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Beryl and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Beryl and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Beryl is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.