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Rock Crystal
Rock Crystal

Common Opal
Common Opal



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Rock Crystal
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Common Opal

Rock Crystal and Common Opal Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.65
ConchoidalWalter Schumann
None
7
SiO 2Walter Schumann , Gemstones of the world (2001)
 
-
-
-
1.98-2.50
Conchoidal
None
5.5-6.5
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Rock Crystal and Common Opal Chemical Formula

While comparing Rock Crystal and Common 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 Rock Crystal and Common Opal chemical formula.

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Rock Crystal and Common Opal Specific Gravity

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