Star Sapphire and Rock Crystal Physical Properties

Star Sapphire and Rock Crystal Chemical Formula

While comparing Star Sapphire and Rock Crystal 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 Star Sapphire and Rock Crystal chemical formula.

• Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
• Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)

Star Sapphire and Rock Crystal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Star Sapphire and Rock Crystal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Sapphire and Rock Crystal Optical Properties during the identification of gemstone. Specific gravity of Star Sapphire is 2.65 whereas that of Rock Crystal is 2.65.