Topaz and Taaffeite Physical Properties

Topaz

Taaffeite

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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

3.49-3.573.60-3.61

1 7.18

1.5 Fracture

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

Conchoidal

1.6 Cleavage

[001] Perfect

Imperfect/fair/absent

1.7 Mohs Hardness

88-8.5

2 10

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references

Topaz and Taaffeite Chemical Formula

While comparing Topaz and Taaffeite 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 Taaffeite chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Taaffeite- Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references

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Topaz and Taaffeite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Taaffeite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Taaffeite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 3.60-3.61 whereas that of Taaffeite is 3.60-3.61.