Goethite and Sodalite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
HCl soluble
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
4.27-4.29
  
2.15-2.40
  
Fracture
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
  
Conchoidal, Uneven, UnevenArthur Thomas, Brittle
  
Cleavage
Perfect {010}
  
Poor on {110}
  
Mohs Hardness
5-5.5
  
5-6
  
Chemical Composition
FeO(OH)Arthur Thomas , Gemstones (2009)
  
Na8Al6Si6O24Cl2
  
Goethite and Sodalite Chemical Formula
While comparing Goethite and Sodalite 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 Goethite and Sodalite chemical formula.
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
- Chemical formula of Sodalite- Na8Al6Si6O24Cl2
Goethite and Sodalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Goethite and Sodalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Sodalite Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.15-2.40 whereas that of Sodalite is 2.15-2.40.