Ettringite and Realgar Physical Properties

Ettringite and Realgar Chemical Formula

While comparing Ettringite and Realgar 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 Realgar 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 Realgar- AsSMichael O’Donoghue , Gems, Sixth Edition (2006)

Ettringite and Realgar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Realgar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Realgar Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 3.56 whereas that of Realgar is 3.56.