Hercynite and Ruby Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
4.39
  
3.97-4.05
  
Fracture
ConchoidalGemdat.org, Uneven
  
Conchoidal
  
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
  
No true cleavage
  
Mohs Hardness
7.5-8
  
9
  
Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
  
Al 2 O 3
  
Hercynite and Ruby Chemical Formula
While comparing Hercynite and Ruby 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 Hercynite and Ruby chemical formula.
- Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
- Chemical formula of Ruby- Al 2 O 3
Hercynite and Ruby Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hercynite and Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Ruby Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 3.97-4.05 whereas that of Ruby is 3.97-4.05.