Alunite and Beryllonite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.6-2.9
  
2.79-2.87
  
Fracture
Conchoidal, Uneven
  
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
  
Cleavage
On {0001}, perfect
  
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
  
Mohs Hardness
3.5-4
  
5.5-6
  
Chemical Composition
KAl3(SO4)2(OH)6
  
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Alunite and Beryllonite Chemical Formula
While comparing Alunite and Beryllonite 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 Beryllonite chemical formula.
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
- Chemical formula of Beryllonite- NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Alunite and Beryllonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alunite and Beryllonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Beryllonite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.79-2.87 whereas that of Beryllonite is 2.79-2.87.