Chalcedony and Smoky Quartz Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.55-2.70
  
2.65
  
Fracture
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann
  
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
Absent
  
{0110} Indistinct
  
Mohs Hardness
6.5-7
  
7
  
Chemical Composition
SiO2
  
SiO2
  
Chalcedony and Smoky Quartz Chemical Formula
While comparing Chalcedony and Smoky Quartz 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 Chalcedony and Smoky Quartz chemical formula.
- Chemical formula of Chalcedony- SiO2
- Chemical formula of Smoky Quartz- SiO2
Chalcedony and Smoky Quartz Specific Gravity
Another important criteria for qualitative analysis of gemstones is Chalcedony and Smoky Quartz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chalcedony and Smoky Quartz Optical Properties during the identification of gemstone. Specific gravity of Chalcedony is 2.65 whereas that of Smoky Quartz is 2.65.