Pyromorphite and Zircon Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
insoluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
6.5-7.1
  
3.93-4.73
  
Fracture
Uneven, ConchoidalArthur Thomas, Brittle, Metallic
  
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
Imperfect- [10 1 1]
  
{110} and {111}
  
Mohs Hardness
3.5-4
  
7.5
  
Chemical Composition
Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
  
ZrSiO4
  
Pyromorphite and Zircon Chemical Formula
While comparing Pyromorphite 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 Pyromorphite and Zircon chemical formula.
- Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
- Chemical formula of Zircon- ZrSiO4
Pyromorphite and Zircon Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pyromorphite and Zircon Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Zircon Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 3.93-4.73 whereas that of Zircon is 3.93-4.73.