Celestine and Polyhalite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.90-4.00
  
2.78
  
Fracture
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
  
Conchoidal, Brittle
  
Cleavage
Perfect on {001}, good on {210}, poor on {010}
  
Perfect on {10 1 }; parting on {010}
  
Mohs Hardness
3-3.5
  
3.5
  
Chemical Composition
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Not Available
  
Celestine and Polyhalite Chemical Formula
While comparing Celestine and Polyhalite 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 Celestine and Polyhalite chemical formula.
- Chemical formula of Celestine- SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
>
Celestine and Polyhalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Celestine and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Celestine and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Celestine is 2.78 whereas that of Polyhalite is 2.78.