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Lapis lazuli and Cinnabar Physical Properties


Cinnabar and Lapis lazuli Physical Properties


Physical Properties

Tenacity
Not Available   
Slightly sectile   

Solubility
Not Available   
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)   

Durability
Not Available   
Not Available   

Specific Gravity
2.50-3.00   
2   

Fracture
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)   
Uneven, Uneven, Gemstones (2009), Brittle   

Cleavage
3,6   
Prismatic {10 1 0}, perfect   

Mohs Hardness
5.5   
2-2.5   

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

Optical Properties >>
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Lapis lazuli and Cinnabar Chemical Formula

While comparing Lapis lazuli and Cinnabar 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 Cinnabar chemical formula.

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Lapis lazuli and Cinnabar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lapis lazuli and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lapis lazuli and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Lapis lazuli is 2 whereas that of Cinnabar is 2.

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