Baryte and Sillimanite Physical Properties
Tenacity
Brittle
  
Tough
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
4.3-5
  
3.20-3.26
  
Fracture
Irregular/uneven
  
Splintery
  
Cleavage
Perfect cleavage parallel to base and prism faces: {001} Perfect, {210} Perfect, {010} Imperfect
  
{010} perfect
  
Mohs Hardness
3-3.5
  
6-7.5
  
Chemical Composition
Not Available
  
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Baryte and Sillimanite Chemical Formula
While comparing Baryte and Sillimanite 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 Baryte and Sillimanite chemical formula.
>- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Baryte and Sillimanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Baryte and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Baryte and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Baryte is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.