Common Opal and Kurnakovite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
1.98-2.50
  
1.847-1.852
  
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
  
Brittle, Conchoidal
  
Cleavage
Not Available
  
Poor to indistinct on {010}
  
Mohs Hardness
5.5-6.5
  
2-3
  
Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
  
Not Available
  
Common Opal and Kurnakovite Chemical Formula
While comparing Common Opal and Kurnakovite 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 Common Opal and Kurnakovite chemical formula.
- Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
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Common Opal and Kurnakovite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Common Opal and Kurnakovite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Common Opal and Kurnakovite Optical Properties during the identification of gemstone. Specific gravity of Common Opal is 1.847-1.852 whereas that of Kurnakovite is 1.847-1.852.