Bertrandite and Gahnite Physical Properties

Bertrandite and Gahnite Chemical Formula

While comparing Bertrandite and Gahnite 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 Bertrandite and Gahnite chemical formula.

• Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
• Chemical formula of Gahnite- ZnAl 2O 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Bertrandite and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bertrandite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bertrandite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Bertrandite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.