Ajoite and Goethite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Decomposed by acids
  
HCl soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.96
  
4.27-4.29
  
Fracture
Not Available
  
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
  
Cleavage
Perfect on {010}
  
Perfect {010}
  
Mohs Hardness
5
  
5-5.5
  
Chemical Composition
(K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O)
  
FeO(OH)Arthur Thomas , Gemstones (2009)
  
Ajoite and Goethite Chemical Formula
While comparing Ajoite and Goethite 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 Ajoite and Goethite chemical formula.
- Chemical formula of Ajoite- (K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O)
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Ajoite and Goethite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ajoite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ajoite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Ajoite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.