Biotite and Diaspore Physical Properties
Tenacity
Brittle
Very brittle
Solubility
Not Available
insoluble
Durability
Not Available
Not Available
Specific Gravity
2.7-3.3
3.30-3.40
Fracture
Uneven, Even, Yellow, White
Conchoidal, Brittle, Conchoidal
Cleavage
Perfect on the {001}
{010} perfect, {110} distinct, {100} in traces
Mohs Hardness
2.5-3.0
6.5-7
Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Biotite and Diaspore Chemical Formula
While comparing Biotite and Diaspore 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 Diaspore chemical formula.
- Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
- Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Biotite and Diaspore Specific Gravity
Another important criteria for qualitative analysis of gemstones is Biotite and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.