Alunite and Gyrolite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.6-2.9
  
2.48
  
Fracture
Conchoidal, Uneven
  
Brittle, Uneven, Brittle, Uneven
  
Cleavage
On {0001}, perfect
  
Perfect on {001}
  
Mohs Hardness
3.5-4
  
2
  
Chemical Composition
KAl3(SO4)2(OH)6
  
NaCa16Si23AlO60(OH)8•64(H2O)
  
Alunite and Gyrolite Chemical Formula
While comparing Alunite and Gyrolite 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 Gyrolite chemical formula.
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
- Chemical formula of Gyrolite- NaCa16Si23AlO60(OH)8•64(H2O)
Alunite and Gyrolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alunite and Gyrolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Gyrolite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.48 whereas that of Gyrolite is 2.48.