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Ruby
Ruby

Common Opal
Common Opal



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X
Ruby
X
Common Opal

Ruby and Common Opal Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
3.97-4.05
Conchoidal
No true cleavage
9
Al 2 O 3
 
-
-
-
1.98-2.50
Conchoidal
None
5.5-6.5
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Ruby and Common Opal Chemical Formula

While comparing Ruby 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 Ruby and Common Opal chemical formula.

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Ruby and Common Opal Specific Gravity

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