Biotite and Rhodochrosite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.7-3.3
  
3.0-3.3
  
Fracture
Uneven, Even, Yellow, White
  
Uneven, Conchoidal, Conchoidal to uneven, Brittle
  
Cleavage
Perfect on the {001}
  
On {10 1 1} perfect; parting on {10 1 2}
  
Mohs Hardness
2.5-3.0
  
3.5-4
  
Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2
  
MnCO3
  
Biotite and Rhodochrosite Chemical Formula
While comparing Biotite and Rhodochrosite 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 Rhodochrosite chemical formula.
- Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
- Chemical formula of Rhodochrosite- MnCO3
Biotite and Rhodochrosite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Biotite and Rhodochrosite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Rhodochrosite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.0-3.3 whereas that of Rhodochrosite is 3.0-3.3.