Topaz and Zinnwaldite Physical Properties

Topaz

Zinnwaldite

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1 Physical Properties

1.1 Tenacity

Not Available

Elastic

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.49-3.572.9-3.1

1 7.18

1.5 Fracture

Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Uneven

1.6 Cleavage

[001] Perfect

Perfect basal {001}

1.7 Mohs Hardness

83.5-4.0

2 10

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

Not Available

Topaz and Zinnwaldite Chemical Formula

While comparing Topaz and Zinnwaldite 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 Topaz and Zinnwaldite chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

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Topaz and Zinnwaldite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Zinnwaldite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Zinnwaldite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.9-3.1 whereas that of Zinnwaldite is 2.9-3.1.