Dumortierite and Oligoclase Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
2.62-2.67
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
From the Greek, oligos and kasein, little cleavage.
Mohs Hardness
7-8.5
6-6.5
Chemical Composition
AlAl6O3BSi3O18
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Dumortierite and Oligoclase Chemical Formula
While comparing Dumortierite and Oligoclase 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 Oligoclase chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
- Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Dumortierite and Oligoclase Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Oligoclase Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 2.62-2.67 whereas that of Oligoclase is 2.62-2.67.