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Iolite
Iolite

Neptunite
Neptunite



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Iolite
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Neptunite

Iolite and Neptunite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.6-2.7
-
3,1
7-7.5
Mg2Al4Si5O18
 
Brittle
-
-
3.19-3.23
Conchoidal
{110} good
5-6
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael O’Donoghue , Gems, Sixth Edition (2006)

Iolite and Neptunite Chemical Formula

While comparing Iolite and Neptunite 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 Iolite and Neptunite chemical formula.

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Iolite and Neptunite Specific Gravity

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