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Opal
Opal

Neptunite
Neptunite



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Opal
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Neptunite

Opal and Neptunite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
BrittleWalter Schumann
hot salt water
-
1.98-2.25
Conchoidal
None
5-6.5
SiO2 · nH2O
 
Brittle
-
-
3.19-3.23
Conchoidal
{110} good
5-6
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael O’Donoghue , Gems, Sixth Edition (2006)

Opal and Neptunite Chemical Formula

While comparing Opal 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 Opal and Neptunite chemical formula.

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Opal and Neptunite Specific Gravity

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