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