Petalite and Gahnite Physical Properties

Petalite and Gahnite Chemical Formula

While comparing Petalite 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 Petalite and Gahnite chemical formula.

• Chemical formula of Petalite- LiAlSi 4O 10Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
• Chemical formula of Gahnite- ZnAl 2O 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Petalite and Gahnite Specific Gravity

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