Biotite and Hurlbutite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.7-3.3
2.90
Fracture
Uneven, Even, Yellow, White
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
Perfect on the {001}
None
Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2
CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Biotite and Hurlbutite Chemical Formula
While comparing Biotite and Hurlbutite 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 Hurlbutite chemical formula.
- Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
- Chemical formula of Hurlbutite- CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Biotite and Hurlbutite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Biotite and Hurlbutite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Hurlbutite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.90 whereas that of Hurlbutite is 2.90.