Pietersite and Biotite Physical Properties

Pietersite and Biotite Chemical Formula

While comparing Pietersite 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 Pietersite and Biotite chemical formula.

• Chemical formula of Pietersite- H2O+Fe2+,H3O2+Fe3+Si4O12
• Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2

Pietersite and Biotite Specific Gravity

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