Andalusite and Cordierite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.05-3.21
2.57-2.66
Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Subconchoidal, Conchoidal, Brittle
Cleavage
Good on {110}, poor on {100}
Fair on {100}, poor on {001} and {010}
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Mg2Al4Si5O18
Andalusite and Cordierite Chemical Formula
While comparing Andalusite 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 Andalusite and Cordierite chemical formula.
- Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Cordierite- Mg2Al4Si5O18
Andalusite and Cordierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Andalusite and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.