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Ruby
Ruby

Opal
Opal



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Ruby
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Ruby and Opal Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
BrittleWalter Schumann
1.2 Solubility
Not Available
hot salt water
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.97-4.05
1.98-2.25
1.5 Fracture
Conchoidal
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
1.6 Cleavage
No true cleavage
None
1.7 Mohs Hardness
9
5-6.5
1.8 Chemical Composition
Al 2 O 3
SiO2 · nH2O

Ruby and Opal Chemical Formula

While comparing Ruby 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 Ruby and Opal chemical formula.

  • Chemical formula of Ruby- Al 2 O 3
  • Chemical formula of Opal- SiO2 · nH2O

Ruby and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Opal Optical Properties during the identification of gemstone. Specific gravity of Ruby is 1.98-2.25 whereas that of Opal is 1.98-2.25.