Ettringite and Sapphire Physical Properties

Ettringite and Sapphire Chemical Formula

While comparing Ettringite and 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 Ettringite and Sapphire chemical formula.

• Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Sapphire- Al ₂ O ₃

Ettringite and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.