Star Ruby and Poldervaartite Physical Properties

Star Ruby and Poldervaartite Chemical Formula

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

• Chemical formula of Star Ruby- Al 2O 3Michael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Poldervaartite- (Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

Star Ruby and Poldervaartite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Star Ruby and Poldervaartite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Ruby and Poldervaartite Optical Properties during the identification of gemstone. Specific gravity of Star Ruby is 2.91 whereas that of Poldervaartite is 2.91.