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Neptunite
Neptunite
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Star Sapphire
Star Sapphire
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Neptunite
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Star Sapphire

Neptunite and Star Sapphire Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
3.19-3.23
Conchoidal
{110} good
5-6
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael O’Donoghue , Gems, Sixth Edition (2006)
 
-
-
-
3.90-4.05
-
None
-9999
Al 2O 3Ulrich Henn and Claudio C.

Neptunite and Star Sapphire Chemical Formula

While comparing Neptunite 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 Neptunite and Star Sapphire chemical formula.

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Neptunite and Star Sapphire Specific Gravity

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