Gahnite and Chalcedony Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
4.00-4.62
  
2.55-2.70
  
Fracture
Conchoidal, Uneven
  
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann
  
Cleavage
Indistinct parting on [111]
  
Absent
  
Mohs Hardness
7.5-8
  
6.5-7
  
Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
  
SiO2
  
Gahnite and Chalcedony Chemical Formula
While comparing Gahnite and Chalcedony 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 Gahnite and Chalcedony chemical formula.
- Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Chalcedony- SiO2
Gahnite and Chalcedony Specific Gravity
Another important criteria for qualitative analysis of gemstones is Gahnite and Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 2.55-2.70 whereas that of Chalcedony is 2.55-2.70.