Zircon and Alexandrite Physical Properties

Zircon

Alexandrite

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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

3.93-4.733.69-3.81

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

Not Available

1.6 Cleavage

{110} and {111}

1,1 ; 3,2.

1.7 Mohs Hardness

7.58.5

2 10

1.8 Chemical Composition

ZrSiO₄

BeAl ₂ O ₄

Zircon and Alexandrite Chemical Formula

While comparing Zircon and Alexandrite 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 Alexandrite chemical formula.

Chemical formula of Zircon- ZrSiO₄
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Zircon and Alexandrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zircon and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zircon and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Zircon is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.