Dumortierite and Esperite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
4.28-4.42
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Metallic
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Distinct on [010] and [100] poor on [101]
Mohs Hardness
7-8.5
5-5.5
Chemical Composition
AlAl6O3BSi3O18
PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
Dumortierite and Esperite Chemical Formula
While comparing Dumortierite and Esperite 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 Esperite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
- Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
Dumortierite and Esperite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Esperite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 4.28-4.42 whereas that of Esperite is 4.28-4.42.