Dumortierite and Pyrophyllite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
2.65-2.90
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Gemstones (2009), Flexible Flexible fragments.
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
{001} Perfect
Mohs Hardness
7-8.5
Not Available
Chemical Composition
AlAl6O3BSi3O18
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Dumortierite and Pyrophyllite Chemical Formula
While comparing Dumortierite 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 Dumortierite and Pyrophyllite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
- Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Dumortierite and Pyrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.