Corundum and Cinnabar Physical Properties
Tenacity
Brittle
Slightly sectile
Solubility
insoluble
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
Durability
Not Available
Not Available
Specific Gravity
3.90-4.05
2
Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Uneven, Uneven, Gemstones (2009), Brittle
Cleavage
None – parting in 3 directions
Prismatic {10 1 0}, perfect
Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Corundum and Cinnabar Chemical Formula
While comparing Corundum and Cinnabar 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 Cinnabar chemical formula.
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Corundum and Cinnabar Specific Gravity
Another important criteria for qualitative analysis of gemstones is Corundum and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2 whereas that of Cinnabar is 2.