Phlogopite and Hurlbutite Physical Properties
Tenacity
Tough
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.78-2.85
  
2.90
  
Fracture
None, Uneven
  
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
  
Cleavage
Perfect basal (001)
  
None
  
Mohs Hardness
2-2.5
  
6
  
Chemical Composition
Not Available
  
CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Phlogopite and Hurlbutite Chemical Formula
While comparing Phlogopite 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 Phlogopite and Hurlbutite chemical formula.
>- Chemical formula of Hurlbutite- CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Phlogopite and Hurlbutite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Phlogopite and Hurlbutite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phlogopite and Hurlbutite Optical Properties during the identification of gemstone. Specific gravity of Phlogopite is 2.90 whereas that of Hurlbutite is 2.90.