Biotite and Zircon Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
insoluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.7-3.3
  
3.93-4.73
  
Fracture
Uneven, Even, Yellow, White
  
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
Perfect on the {001}
  
{110} and {111}
  
Mohs Hardness
2.5-3.0
  
7.5
  
Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2
  
ZrSiO4
  
Biotite and Zircon Chemical Formula
While comparing Biotite and Zircon 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 Zircon chemical formula.
- Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
- Chemical formula of Zircon- ZrSiO4
Biotite and Zircon Specific Gravity
Another important criteria for qualitative analysis of gemstones is Biotite and Zircon Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Zircon Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.93-4.73 whereas that of Zircon is 3.93-4.73.