Biotite and Anhydrite Physical Properties
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.7-3.3
2.90-2.98
Fracture
Uneven, Even, Yellow, White
Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
Perfect on the {001}
Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.
Mohs Hardness
2.5-3.0
3.5
Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2
CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Biotite and Anhydrite Chemical Formula
While comparing Biotite and Anhydrite 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 Anhydrite chemical formula.
- Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
- Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Biotite and Anhydrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Biotite and Anhydrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Anhydrite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.90-2.98 whereas that of Anhydrite is 2.90-2.98.