Zircon and Andalusite Physical Properties

Zircon

Andalusite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.93-4.73

3.05-3.21

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

{110} and {111}

Good on {110}, poor on {100}

1.7 Mohs Hardness

7.5

1.8 Chemical Composition

ZrSiO₄

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

Zircon and Andalusite Chemical Formula

While comparing Zircon 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 Zircon and Andalusite chemical formula.

Chemical formula of Zircon- ZrSiO₄
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Zircon and Andalusite Specific Gravity

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