Gahnospinel and Onyx Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.65-4.55
  
2.55-2.70
  
Fracture
ConchoidalArthur Thomas, Gemstones (2009)
  
Not Available
  
Cleavage
None, but may exhibit slight parting
  
Indiscernible
  
Mohs Hardness
7.5-8
  
6.5-7
  
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
  
SiO2
  
Gahnospinel and Onyx Chemical Formula
While comparing Gahnospinel and Onyx 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 Gahnospinel and Onyx chemical formula.
- Chemical formula of Gahnospinel- (Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
- Chemical formula of Onyx- SiO2
Gahnospinel and Onyx Specific Gravity
Another important criteria for qualitative analysis of gemstones is Gahnospinel and Onyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnospinel and Onyx Optical Properties during the identification of gemstone. Specific gravity of Gahnospinel is 2.55-2.70 whereas that of Onyx is 2.55-2.70.