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Feldspar
Feldspar

Opal
Opal



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Feldspar
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Opal

Feldspar and Opal Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.56-2.75
Uneven, Conchoidal
two or three
6-6.5
KAlSi3O8
 
BrittleWalter Schumann
hot salt water
-
1.98-2.25
Conchoidal
None
5-6.5
SiO2 · nH2O

Feldspar and Opal Chemical Formula

While comparing Feldspar and 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 Feldspar and Opal chemical formula.

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Feldspar and Opal Specific Gravity

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