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Topaz and Poudretteite Physical Properties


Poudretteite and Topaz Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.49-3.57   
2.51-2.53   

Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle   
Conchoidal, Splintery   

Cleavage
[001] Perfect   
None   

Mohs Hardness
8   
5   

Chemical Composition
Al2SiO4(F,OH)2   
KNa 2B 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Topaz and Poudretteite Chemical Formula

While comparing Topaz and Poudretteite 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 Poudretteite chemical formula.

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Topaz and Poudretteite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Poudretteite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Poudretteite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.51-2.53 whereas that of Poudretteite is 2.51-2.53.

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