Ettringite and Lepidolite Physical Properties

Ettringite and Lepidolite Chemical Formula

While comparing Ettringite and Lepidolite 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 Lepidolite 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 Lepidolite- Mg 3Si 4O 10(OH) 2Ulrich Henn and Claudio C.

Ettringite and Lepidolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Lepidolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Lepidolite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 2.80-2.90 whereas that of Lepidolite is 2.80-2.90.