Biotite and Jet Physical Properties

Biotite and Jet Chemical Formula

While comparing Biotite and Jet 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 Biotite and Jet chemical formula.

• Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
• Chemical formula of Jet- C

Biotite and Jet Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Jet Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Jet Optical Properties during the identification of gemstone. Specific gravity of Biotite is 1.19-1.35 whereas that of Jet is 1.19-1.35.