Corundum and Star Sapphire Physical Properties

Corundum and Star Sapphire Chemical Formula

While comparing Corundum and Star Sapphire 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 Sapphire chemical formula.

• Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
• Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

Corundum and Star Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Corundum is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.