Topaz and Vishnevite Physical Properties

Topaz

Vishnevite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.49-3.57

Not Available

1.5 Fracture

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

Brittle, Uneven

1.6 Cleavage

[001] Perfect

Perfect

1.7 Mohs Hardness

5-6

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

Not Available

Topaz and Vishnevite Chemical Formula

While comparing Topaz and Vishnevite 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 Vishnevite chemical formula.

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

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Topaz and Vishnevite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Vishnevite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Vishnevite Optical Properties during the identification of gemstone. Specific gravity of Topaz is Not Available whereas that of Vishnevite is Not Available.