Dumortierite and Gedrite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
3.15-3.259
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Not Available
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
Mohs Hardness
7-8.5
5.5-6
Chemical Composition
AlAl6O3BSi3O18
(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Dumortierite and Gedrite Chemical Formula
While comparing Dumortierite and Gedrite 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 Gedrite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
- Chemical formula of Gedrite- (Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Dumortierite and Gedrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Gedrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Gedrite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 3.15-3.259 whereas that of Gedrite is 3.15-3.259.