Cinnabar and Biotite Physical Properties
Tenacity
Slightly sectile
Brittle
Solubility
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
Not Available
Durability
Not Available
Not Available
Specific Gravity
2
2.7-3.3
Fracture
Uneven, Uneven, Gemstones (2009), Brittle
Uneven, Even, Yellow, White
Cleavage
Prismatic {10 1 0}, perfect
Perfect on the {001}
Mohs Hardness
2-2.5
2.5-3.0
Chemical Composition
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
K(Mg,Fe++)3[AlSi3O10(OH,F)2
Cinnabar and Biotite Chemical Formula
While comparing Cinnabar 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 Cinnabar and Biotite chemical formula.
- Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Cinnabar and Biotite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cinnabar and Biotite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Biotite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 2.7-3.3 whereas that of Biotite is 2.7-3.3.