Cordierite and Pyrophyllite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.57-2.66
2.65-2.90
Fracture
Subconchoidal, Conchoidal, Brittle
Gemstones (2009), Flexible Flexible fragments.
Cleavage
Fair on {100}, poor on {001} and {010}
{001} Perfect
Mohs Hardness
7-7.5
Not Available
Chemical Composition
Mg2Al4Si5O18
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cordierite and Pyrophyllite Chemical Formula
While comparing Cordierite 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 Cordierite and Pyrophyllite chemical formula.
- Chemical formula of Cordierite- Mg2Al4Si5O18
- Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cordierite and Pyrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cordierite and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.