Andalusite and Dumortierite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.05-3.21
3.26-3.41
Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Cleavage
Good on {110}, poor on {100}
Distinct on {100}, poor on {110}; parting on {001}
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
AlAl6O3BSi3O18
Andalusite and Dumortierite Chemical Formula
While comparing Andalusite and Dumortierite 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 Dumortierite chemical formula.
- Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
Andalusite and Dumortierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Andalusite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.