Calcite and Tantalite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.67-2.73
  
5.2
  
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
  
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
Perfect on [10 1 1] three directions with angle of 74° 55
  
Good in one direction
  
Mohs Hardness
3
  
6-6.5
  
Chemical Composition
CaCO 3Ulrich Henn and Claudio C.
  
(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
  
Calcite and Tantalite Chemical Formula
While comparing Calcite and Tantalite 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 Tantalite chemical formula.
- Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
- Chemical formula of Tantalite- (Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
Calcite and Tantalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Calcite and Tantalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Tantalite Optical Properties during the identification of gemstone. Specific gravity of Calcite is 5.2 whereas that of Tantalite is 5.2.