Moss Opal and Topaz Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
1.98-2.50
  
3.49-3.57
  
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
  
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
  
Cleavage
Not Available
  
[001] Perfect
  
Mohs Hardness
5.5-6.5
  
8
  
Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
  
Al2SiO4(F,OH)2
  
Moss Opal and Topaz Chemical Formula
While comparing Moss Opal and Topaz 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 Moss Opal and Topaz chemical formula.
- Chemical formula of Moss Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
- Chemical formula of Topaz- Al2SiO4(F,OH)2
Moss Opal and Topaz Specific Gravity
Another important criteria for qualitative analysis of gemstones is Moss Opal and Topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Moss Opal and Topaz Optical Properties during the identification of gemstone. Specific gravity of Moss Opal is 3.49-3.57 whereas that of Topaz is 3.49-3.57.