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