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Danburite and Lapis lazuli Physical Properties


Lapis lazuli and Danburite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.97-3.03   
2.50-3.00   

Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle   
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)   

Cleavage
{001} Poor   
3,6   

Mohs Hardness
7   
5.5   

Chemical Composition
CaB 2(SiO 4) 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4   

Optical Properties >>
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Danburite and Lapis lazuli Chemical Formula

While comparing Danburite and Lapis lazuli 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 Danburite and Lapis lazuli chemical formula.

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Danburite and Lapis lazuli Specific Gravity

Another important criteria for qualitative analysis of gemstones is Danburite and Lapis lazuli Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Danburite and Lapis lazuli Optical Properties during the identification of gemstone. Specific gravity of Danburite is 2.50-3.00 whereas that of Lapis lazuli is 2.50-3.00.

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