Alunite and Rhodolite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.6-2.9
  
3.84
  
Fracture
Conchoidal, Uneven
  
Conchoidal
  
Cleavage
On {0001}, perfect
  
none, may show indistinct parting
  
Mohs Hardness
3.5-4
  
7-7.5
  
Chemical Composition
KAl3(SO4)2(OH)6
  
(Mg,Fe)3Al2Si3O12
  
Alunite and Rhodolite Chemical Formula
While comparing Alunite and Rhodolite 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 Rhodolite chemical formula.
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
- Chemical formula of Rhodolite- (Mg,Fe)3Al2Si3O12
Alunite and Rhodolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alunite and Rhodolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Rhodolite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 3.84 whereas that of Rhodolite is 3.84.