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Chalcedony
Chalcedony

Opal
Opal



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Chalcedony
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Opal

Chalcedony and Opal Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
Soluble
-
2.55-2.70
Uneven, Splintery, Conchoidal
Absent
6.5-7
SiO2
 
BrittleWalter Schumann
hot salt water
-
1.98-2.25
Conchoidal
None
5-6.5
SiO2 · nH2O

Chalcedony and Opal Chemical Formula

While comparing Chalcedony 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 Chalcedony and Opal chemical formula.

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Chalcedony and Opal Specific Gravity

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