Apophyllite and Ettringite Physical Properties

Apophyllite and Ettringite Chemical Formula

While comparing Apophyllite and Ettringite 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 Apophyllite and Ettringite chemical formula.

• Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
• Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Apophyllite and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apophyllite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apophyllite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Apophyllite is 1.77 whereas that of Ettringite is 1.77.