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Nepheline
Nepheline

Black Opal
Black Opal



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Nepheline
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Black Opal

Nepheline and Black Opal Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.55-2.65
Subconchoidal, Conchoidal
[1010] Poor
5-6
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
 
-
-
-
1.97-2.22
Conchoidal
None
6-6.5
SiO 2 + H 2OUlrich Henn and Claudio C.

Nepheline and Black Opal Chemical Formula

While comparing Nepheline and Black Opal 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 Nepheline and Black Opal chemical formula.

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Nepheline and Black Opal Specific Gravity

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