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