Corundum and Caledonite Physical Properties
Solubility
insoluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.90-4.05
5.6-5.76
Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Uneven, UnevenAnthony et al, Handbook of mineralogy (2001)
Cleavage
None – parting in 3 directions
[001] perfect; [100] distinct
Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
Corundum and Caledonite Chemical Formula
While comparing Corundum and Caledonite 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 Corundum and Caledonite chemical formula.
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Caledonite- Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
Corundum and Caledonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Corundum and Caledonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Caledonite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 5.6-5.76 whereas that of Caledonite is 5.6-5.76.