Crystal Opal and Esperite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
1.97-2.22
  
4.28-4.42
  
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
  
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Metallic
  
Cleavage
Not Available
  
Distinct on [010] and [100] poor on [101]
  
Mohs Hardness
5.5-6.5
  
5-5.5
  
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
  
PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
  
Crystal Opal and Esperite Chemical Formula
While comparing Crystal Opal and Esperite 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 Crystal Opal and Esperite chemical formula.
- Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
- Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
Crystal Opal and Esperite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Crystal Opal and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Crystal Opal and Esperite Optical Properties during the identification of gemstone. Specific gravity of Crystal Opal is 4.28-4.42 whereas that of Esperite is 4.28-4.42.