Topaz and Zircon Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
insoluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.49-3.57
  
3.93-4.73
  
Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
  
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
[001] Perfect
  
{110} and {111}
  
Mohs Hardness
8
  
7.5
  
Chemical Composition
Al2SiO4(F,OH)2
  
ZrSiO4
  
Topaz and Zircon Chemical Formula
While comparing Topaz and Zircon 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 Topaz and Zircon chemical formula.
- Chemical formula of Topaz- Al2SiO4(F,OH)2
- Chemical formula of Zircon- ZrSiO4
Topaz and Zircon Specific Gravity
Another important criteria for qualitative analysis of gemstones is Topaz and Zircon Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Zircon Optical Properties during the identification of gemstone. Specific gravity of Topaz is 3.93-4.73 whereas that of Zircon is 3.93-4.73.