Edenite and Opal Physical Properties
Tenacity
Brittle
  
BrittleWalter Schumann
  
Solubility
Not Available
  
hot salt water
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.05-3.37
  
1.98-2.25
  
Fracture
Conchoidal, Brittle, Conchoidal
  
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
  
Cleavage
Good on (110)
  
None
  
Mohs Hardness
5-6
  
5-6.5
  
Chemical Composition
NaCa2Mg5Si7AlO22(OH)2
  
SiO2 · nH2O
  
Edenite and Opal Chemical Formula
While comparing Edenite and Opal 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 Edenite and Opal chemical formula.
- Chemical formula of Edenite- NaCa2Mg5Si7AlO22(OH)2
- Chemical formula of Opal- SiO2 · nH2O
Edenite and Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Edenite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Edenite and Opal Optical Properties during the identification of gemstone. Specific gravity of Edenite is 1.98-2.25 whereas that of Opal is 1.98-2.25.