Starlite and Polyhalite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.91-4.73
  
2.78
  
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
  
Conchoidal, Brittle
  
Cleavage
Not Available
  
Perfect on {10 1 }; parting on {010}
  
Mohs Hardness
6.5-7.5
  
3.5
  
Chemical Composition
ZrSiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Not Available
  
Starlite and Polyhalite Chemical Formula
While comparing Starlite 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 Starlite and Polyhalite chemical formula.
- Chemical formula of Starlite- ZrSiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
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Starlite and Polyhalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Starlite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Starlite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Starlite is 2.78 whereas that of Polyhalite is 2.78.