Bertrandite and Sugilite Physical Properties

Bertrandite and Sugilite Chemical Formula

While comparing Bertrandite and Sugilite 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 Sugilite chemical formula.

• Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
• Chemical formula of Sugilite- KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Bertrandite and Sugilite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bertrandite and Sugilite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bertrandite and Sugilite Optical Properties during the identification of gemstone. Specific gravity of Bertrandite is 2.69-2.79 whereas that of Sugilite is 2.69-2.79.