Dumortierite and Legrandite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
3.98-4.04
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Imperfect, poor one {100}
Mohs Hardness
7-8.5
4.5-5
Chemical Composition
AlAl6O3BSi3O18
Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Dumortierite and Legrandite Chemical Formula
While comparing Dumortierite and Legrandite 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 Legrandite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
- Chemical formula of Legrandite- Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Dumortierite and Legrandite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Legrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Legrandite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 3.98-4.04 whereas that of Legrandite is 3.98-4.04.