Goethite and Smoky Quartz Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
HCl soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
4.27-4.29
  
2.65
  
Fracture
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
  
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
Perfect {010}
  
{0110} Indistinct
  
Mohs Hardness
5-5.5
  
7
  
Chemical Composition
FeO(OH)Arthur Thomas , Gemstones (2009)
  
SiO2
  
Goethite and Smoky Quartz Chemical Formula
While comparing Goethite and Smoky Quartz 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 Smoky Quartz chemical formula.
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
- Chemical formula of Smoky Quartz- SiO2
Goethite and Smoky Quartz Specific Gravity
Another important criteria for qualitative analysis of gemstones is Goethite and Smoky Quartz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Smoky Quartz Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.65 whereas that of Smoky Quartz is 2.65.