Quartz and Purpurite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.65
  
3.2-3.4
  
Fracture
Conchoidal, Conchoidal, Brittle, Gems
  
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
  
Cleavage
{0110} Indistinct
  
[100] [001] perfect
  
Mohs Hardness
7
  
4-4.5
  
Chemical Composition
SiO2
  
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
  
Quartz and Purpurite Chemical Formula
While comparing Quartz and Purpurite 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 Quartz and Purpurite chemical formula.
- Chemical formula of Quartz- SiO2
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Quartz and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Quartz and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Quartz and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Quartz is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.