Hercynite and Sylvite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
4.39
  
1.993
  
Fracture
ConchoidalGemdat.org, Uneven
  
Uneven, Brittle
  
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
  
Perfect on [100], [010], [001]
  
Mohs Hardness
7.5-8
  
2.5
  
Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
  
Not Available
  
Hercynite and Sylvite Chemical Formula
While comparing Hercynite and Sylvite 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 Sylvite chemical formula.
- Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
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Hercynite and Sylvite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hercynite and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 1.993 whereas that of Sylvite is 1.993.