Sillimanite and Eudialyte Physical Properties
Tenacity
Tough
  
Brittle
  
Solubility
Not Available
  
H 2 SO 4
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.20-3.26
  
2.74-3.00
  
Fracture
Splintery
  
Uneven, UnevenArthur Thomas, Gemstones (2009)
  
Cleavage
{010} perfect
  
Distinct on {0001} imperfect on {11 2 0}
  
Mohs Hardness
6-7.5
  
5-5.5
  
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.
  
Sillimanite and Eudialyte Chemical Formula
While comparing Sillimanite and Eudialyte 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 Sillimanite and Eudialyte chemical formula.
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Eudialyte- Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.
Sillimanite and Eudialyte Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sillimanite and Eudialyte Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Eudialyte Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.74-3.00 whereas that of Eudialyte is 2.74-3.00.