Petalite and Allanite Physical Properties

Petalite and Allanite Chemical Formula

While comparing Petalite and Allanite 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 Allanite chemical formula.

• Chemical formula of Petalite- LiAlSi 4O 10Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
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Petalite and Allanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Allanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Allanite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 3.40-4.20 whereas that of Allanite is 3.40-4.20.