Dumortierite and Grandidierite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
2.85-3.00
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Perfect
Chemical Composition
AlAl6O3BSi3O18
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Dumortierite and Grandidierite Chemical Formula
While comparing Dumortierite and Grandidierite 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 Grandidierite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
- Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Dumortierite and Grandidierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Grandidierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Grandidierite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 2.85-3.00 whereas that of Grandidierite is 2.85-3.00.