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Lapis lazuli
Lapis lazuli

Realgar
Realgar



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Lapis lazuli
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Realgar

Lapis lazuli and Realgar Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
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-
-
2.50-3.00
Uneven-Conchoidal, ConchoidalWalter Schumann
3,6
5.5
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
 
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-
-
3.56
-
{010} Good
-9999
AsSMichael O’Donoghue , Gems, Sixth Edition (2006)

Lapis lazuli and Realgar Chemical Formula

While comparing Lapis lazuli and Realgar 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 Realgar chemical formula.

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Lapis lazuli and Realgar Specific Gravity

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