Hardystonite and Emerald Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Hard
  
Specific Gravity
3.396-3.443
  
2.67-2.78
  
Fracture
Brittle, Metallic
  
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
[001] good, [100] and [110] fair
  
Imperfect on the [0001]
  
Mohs Hardness
3-4
  
7.5-8
  
Chemical Composition
Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
  
Be3Al2SiO6
  
Hardystonite and Emerald Chemical Formula
While comparing Hardystonite and Emerald 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 Hardystonite and Emerald chemical formula.
- Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
- Chemical formula of Emerald- Be3Al2SiO6
Hardystonite and Emerald Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hardystonite and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hardystonite and Emerald Optical Properties during the identification of gemstone. Specific gravity of Hardystonite is 2.67-2.78 whereas that of Emerald is 2.67-2.78.