Corundum and Pyrophyllite Physical Properties
Tenacity
Brittle
Not Available
Solubility
insoluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.90-4.05
2.65-2.90
Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Gemstones (2009), Flexible Flexible fragments.
Cleavage
None – parting in 3 directions
{001} Perfect
Mohs Hardness
9
Not Available
Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Corundum and Pyrophyllite Chemical Formula
While comparing Corundum and Pyrophyllite 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 Pyrophyllite chemical formula.
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Corundum and Pyrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Corundum and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.