Precious Opal and Emerald Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Hard
  
Specific Gravity
1.98-2.25
  
2.67-2.78
  
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references
  
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
Not Available
  
Imperfect on the [0001]
  
Mohs Hardness
5-6.5
  
7.5-8
  
Chemical Composition
SiO 2 · nH 2OGemdat.org , Management Team (2012)
  
Be3Al2SiO6
  
Precious Opal and Emerald Chemical Formula
While comparing Precious Opal and Emerald 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 Precious Opal and Emerald chemical formula.
- Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
- Chemical formula of Emerald- Be3Al2SiO6
Precious Opal and Emerald Specific Gravity
Another important criteria for qualitative analysis of gemstones is Precious Opal and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Emerald Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 2.67-2.78 whereas that of Emerald is 2.67-2.78.