Smoky Quartz and Coral Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.65
  
2.60-2.70
  
Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Irregular, Irregular, Gemstones of the world (2001)
  
Cleavage
{0110} Indistinct
  
Not Available
  
Mohs Hardness
7
  
3-4
  
Chemical Composition
SiO2
  
CaCO 3Ulrich Henn and Claudio C.
  
Smoky Quartz and Coral Chemical Formula
While comparing Smoky Quartz and Coral 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 Smoky Quartz and Coral chemical formula.
- Chemical formula of Smoky Quartz- SiO2
- Chemical formula of Coral- CaCO 3Ulrich Henn and Claudio C.
Smoky Quartz and Coral Specific Gravity
Another important criteria for qualitative analysis of gemstones is Smoky Quartz and Coral Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Smoky Quartz and Coral Optical Properties during the identification of gemstone. Specific gravity of Smoky Quartz is 2.60-2.70 whereas that of Coral is 2.60-2.70.