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Lapis lazuli
Lapis lazuli
☒

Star Sapphire
Star Sapphire
☒



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Lapis lazuli
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Star Sapphire

Lapis lazuli and Star Sapphire Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
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
 
-
-
-
3.90-4.05
-
None
-9999
Al 2O 3Ulrich Henn and Claudio C.

Lapis lazuli and Star Sapphire Chemical Formula

While comparing Lapis lazuli and Star Sapphire 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 Star Sapphire chemical formula.

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Lapis lazuli and Star Sapphire Specific Gravity

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