Calcite and Corundum Physical Properties
Solubility
Soluble
insoluble
Durability
Not Available
Not Available
Specific Gravity
2.67-2.73
3.90-4.05
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Uneven, Uneven, Gems, Difficult, Fibrous
Cleavage
Perfect on [10 1 1] three directions with angle of 74° 55
None – parting in 3 directions
Chemical Composition
CaCO 3Ulrich Henn and Claudio C.
Al 2O 3Arthur Thomas , Gemstones (2009)
Calcite and Corundum Chemical Formula
While comparing Calcite and Corundum 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 Corundum chemical formula.
- Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Calcite and Corundum Specific Gravity
Another important criteria for qualitative analysis of gemstones is Calcite and Corundum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Corundum Optical Properties during the identification of gemstone. Specific gravity of Calcite is 3.90-4.05 whereas that of Corundum is 3.90-4.05.