Iolite and Albite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.6-2.7
  
2.60-2.65
  
Fracture
Not Available
  
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
  
Cleavage
3,1
  
Perfect on {001}, very good on {010}, imperfect on {110}
  
Mohs Hardness
7-7.5
  
6-6.5
  
Chemical Composition
Mg2Al4Si5O18
  
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Iolite and Albite Chemical Formula
While comparing Iolite and Albite 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 Iolite and Albite chemical formula.
- Chemical formula of Iolite- Mg2Al4Si5O18
- Chemical formula of Albite- NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Iolite and Albite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Iolite and Albite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Albite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.60-2.65 whereas that of Albite is 2.60-2.65.