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Corundum
Corundum

Star Ruby
Star Ruby



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Corundum
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Star Ruby

Corundum and Star Ruby Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
insoluble
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.90-4.053.95-4.10
Amber
1 7.18
1.5 Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Uneven, Uneven, Gems, Sixth Edition (2006)
1.6 Cleavage
None – parting in 3 directions
Not Available
1.7 Mohs Hardness
9Not Available
Amber
2 10
1.8 Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
Al 2O 3Michael O’Donoghue , Gems, Sixth Edition (2006)

Corundum and Star Ruby Chemical Formula

While comparing Corundum and Star Ruby 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 Corundum and Star Ruby chemical formula.

  • Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
  • Chemical formula of Star Ruby- Al 2O 3Michael O’Donoghue , Gems, Sixth Edition (2006)

Corundum and Star Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Star Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Star Ruby Optical Properties during the identification of gemstone. Specific gravity of Corundum is 3.95-4.10 whereas that of Star Ruby is 3.95-4.10.