Serandite and Biotite Physical Properties

Serandite and Biotite Chemical Formula

While comparing Serandite and Biotite 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 Serandite and Biotite chemical formula.

• Chemical formula of Serandite- Na(Mn2+ ,Ca) 2Si 3O 8(OH)Michael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2

Serandite and Biotite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Serandite and Biotite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Serandite and Biotite Optical Properties during the identification of gemstone. Specific gravity of Serandite is 2.7-3.3 whereas that of Biotite is 2.7-3.3.