Corundum and Diaspore Physical Properties
Tenacity
Brittle
Very brittle
Solubility
insoluble
insoluble
Durability
Not Available
Not Available
Specific Gravity
3.90-4.05
3.30-3.40
Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Conchoidal, Brittle, Conchoidal
Cleavage
None – parting in 3 directions
{010} perfect, {110} distinct, {100} in traces
Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Corundum and Diaspore Chemical Formula
While comparing Corundum and Diaspore 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 Diaspore chemical formula.
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Corundum and Diaspore Specific Gravity
Another important criteria for qualitative analysis of gemstones is Corundum and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Corundum is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.