Iolite and Faustite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.6-2.7
  
2.9
  
Fracture
Not Available
  
Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal
  
Cleavage
3,1
  
{???} Indistinct
  
Mohs Hardness
7-7.5
  
4.5
  
Chemical Composition
Mg2Al4Si5O18
  
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
  
Iolite and Faustite Chemical Formula
While comparing Iolite and Faustite 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 Faustite chemical formula.
- Chemical formula of Iolite- Mg2Al4Si5O18
- Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Iolite and Faustite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Iolite and Faustite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Faustite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.9 whereas that of Faustite is 2.9.