Corundum and Dioptase Physical Properties
Solubility
insoluble
Soluble
Durability
Not Available
Not Available
Specific Gravity
3.90-4.05
3.25-3.35
Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
Cleavage
None – parting in 3 directions
Perfect in three directions
Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Corundum and Dioptase Chemical Formula
While comparing Corundum and Dioptase 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 Dioptase chemical formula.
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Dioptase- CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Corundum and Dioptase Specific Gravity
Another important criteria for qualitative analysis of gemstones is Corundum and Dioptase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Dioptase Optical Properties during the identification of gemstone. Specific gravity of Corundum is 3.25-3.35 whereas that of Dioptase is 3.25-3.35.