Petalite and Sugilite Physical Properties

Petalite and Sugilite Chemical Formula

While comparing Petalite 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 Petalite and Sugilite chemical formula.

• Chemical formula of Petalite- LiAlSi 4O 10Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
• Chemical formula of Sugilite- KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Petalite and Sugilite Specific Gravity

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