Iolite and Willemite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.6-2.7
  
3.89-4.18
  
Fracture
Not Available
  
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven
  
Cleavage
3,1
  
{0001}, {11 2 0} imperfect
  
Mohs Hardness
7-7.5
  
5.5
  
Chemical Composition
Mg2Al4Si5O18
  
Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Iolite and Willemite Chemical Formula
While comparing Iolite and Willemite 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 Willemite chemical formula.
- Chemical formula of Iolite- Mg2Al4Si5O18
- Chemical formula of Willemite- Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Iolite and Willemite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Iolite and Willemite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Willemite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 3.89-4.18 whereas that of Willemite is 3.89-4.18.