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Lapis lazuli and Sunstone Physical Properties


Sunstone and Lapis lazuli Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.50-3.00   
2.62-2.65   

Fracture
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)   
Gemstones of the world (2001)   

Cleavage
3,6   
001   

Mohs Hardness
5.5   
6   

Chemical Composition
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4   
Microcline: KAlSi3O8 Oligoclase: (Na,Ca)Al1-2Si3-2O8   

Optical Properties >>
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Lapis lazuli and Sunstone Chemical Formula

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

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Lapis lazuli and Sunstone Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lapis lazuli and Sunstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lapis lazuli and Sunstone Optical Properties during the identification of gemstone. Specific gravity of Lapis lazuli is 2.62-2.65 whereas that of Sunstone is 2.62-2.65.

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