Alunite and Zircon Physical Properties

Alunite

Zircon

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.93.93-4.73

1 7.18

1.5 Fracture

Conchoidal, Uneven

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

On {0001}, perfect

{110} and {111}

1.7 Mohs Hardness

3.5-47.5

2 10

1.8 Chemical Composition

KAl3(SO4)2(OH)6

ZrSiO₄

Alunite and Zircon Chemical Formula

While comparing Alunite and Zircon 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 Alunite and Zircon chemical formula.

Chemical formula of Alunite- KAl3(SO4)2(OH)6
Chemical formula of Zircon- ZrSiO₄

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Alunite and Zircon Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Zircon Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Zircon Optical Properties during the identification of gemstone. Specific gravity of Alunite is 3.93-4.73 whereas that of Zircon is 3.93-4.73.