Calcite and Hardystonite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.67-2.73
  
3.396-3.443
  
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
  
Brittle, Metallic
  
Cleavage
Perfect on [10 1 1] three directions with angle of 74° 55
  
[001] good, [100] and [110] fair
  
Mohs Hardness
3
  
3-4
  
Chemical Composition
CaCO 3Ulrich Henn and Claudio C.
  
Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
  
Calcite and Hardystonite Chemical Formula
While comparing Calcite and Hardystonite 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 Calcite and Hardystonite chemical formula.
- Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
- Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
Calcite and Hardystonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Calcite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Calcite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.