Topaz and Verdite Physical Properties

Topaz

Verdite

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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

2.80-3.0

1.5 Fracture

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

Not Available

1.6 Cleavage

[001] Perfect

{110} Good

1.7 Mohs Hardness

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

NaFeS2•2(H2O)

Topaz and Verdite Chemical Formula

While comparing Topaz and Verdite 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 Verdite chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Verdite- NaFeS2•2(H2O)

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Topaz and Verdite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Verdite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Verdite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.80-3.0 whereas that of Verdite is 2.80-3.0.