Alunite and Falcons Eye Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.6-2.9
  
2.58-2.64
  
Fracture
Conchoidal, Uneven
  
Gemstones of the world (2001)
  
Cleavage
On {0001}, perfect
  
Not Available
  
Mohs Hardness
3.5-4
  
7
  
Chemical Composition
KAl3(SO4)2(OH)6
  
SiO 2Walter Schumann , Gemstones of the world (2001)
  
Alunite and Falcons Eye Chemical Formula
While comparing Alunite and Falcons Eye 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 Alunite and Falcons Eye chemical formula.
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
- Chemical formula of Falcons Eye- SiO 2Walter Schumann , Gemstones of the world (2001)
Alunite and Falcons Eye Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alunite and Falcons Eye Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Falcons Eye Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.58-2.64 whereas that of Falcons Eye is 2.58-2.64.