Emerald and Andalusite Physical Properties

Emerald

Andalusite

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Physical Properties

Tenacity

Solubility

Durability

Hard

Specific Gravity

2.67-2.783.05-3.21

1 7.18

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Fracture

Uneven, ConchoidalWalter Schumann

Uneven, Subconchoidal, Splintery

Cleavage

Imperfect on the [0001]

Good on {110}, poor on {100}

Mohs Hardness

7.5-87.5

2 10

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Chemical Composition

Be₃Al₂SiO₆

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

Emerald and Andalusite Chemical Formula

While comparing Emerald 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 Emerald and Andalusite chemical formula.

Chemical formula of Emerald- Be₃Al₂SiO₆
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Emerald and Andalusite Specific Gravity

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