Gibbsite and Faustite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.35
  
2.9
  
Fracture
Fibrous, Difficult, Fibrous
  
Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal
  
Cleavage
{001} Perfect
  
{???} Indistinct
  
Mohs Hardness
2.5-3
  
4.5
  
Chemical Composition
Al(OH)3
  
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
  
Gibbsite and Faustite Chemical Formula
While comparing Gibbsite 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 Gibbsite and Faustite chemical formula.
- Chemical formula of Gibbsite- Al(OH)3
- Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Gibbsite and Faustite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Gibbsite and Faustite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gibbsite and Faustite Optical Properties during the identification of gemstone. Specific gravity of Gibbsite is 2.9 whereas that of Faustite is 2.9.