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Topaz and Lazurite Physical Properties


Lazurite and Topaz Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Soluble   

Durability
Not Available   
Not Available   

Specific Gravity
3.49-3.57   
2.75   

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

Cleavage
[001] Perfect   
Imperfect on {110}   

Mohs Hardness
8   
5.5   

Chemical Composition
Al2SiO4(F,OH)2   
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.   

Optical Properties >>
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Topaz and Lazurite Chemical Formula

While comparing Topaz and Lazurite 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 Lazurite chemical formula.

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Topaz and Lazurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.75 whereas that of Lazurite is 2.75.

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