Topaz and Villiaumite Physical Properties

Topaz

Villiaumite

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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

3.49-3.572.79

1 7.18

2.4 Fracture

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

Brittle, Metallic

2.5 Cleavage

[001] Perfect

{100} Perfect, {010} Perfect, {001} Perfect

2.6 Mohs Hardness

2 10

2.9 Chemical Composition

Al₂SiO₄(F,OH)₂

NaFUlrich Henn and Claudio C.

Topaz and Villiaumite Chemical Formula

While comparing Topaz and Villiaumite 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 Villiaumite chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Villiaumite- NaFUlrich Henn and Claudio C.

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Topaz and Villiaumite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Villiaumite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Villiaumite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.79 whereas that of Villiaumite is 2.79.