Corundum and Ruby Physical Properties

Corundum and Ruby Chemical Formula

While comparing Corundum and 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 Ruby chemical formula.

• Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
• Chemical formula of Ruby- Al ₂ O ₃

Corundum and Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Ruby Optical Properties during the identification of gemstone. Specific gravity of Corundum is 3.97-4.05 whereas that of Ruby is 3.97-4.05.