Dumortierite and Ettringite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Partially soluble in water
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
1.77
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}
Perfect on {10 1 0}
Mohs Hardness
7-8.5
2-2.5
Chemical Composition
AlAl6O3BSi3O18
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Dumortierite and Ettringite Chemical Formula
While comparing Dumortierite and Ettringite 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 Ettringite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Dumortierite and Ettringite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 1.77 whereas that of Ettringite is 1.77.