Londonite and Dumortierite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.34
3.26-3.41
Fracture
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Cleavage
None
Distinct on {100}, poor on {110}; parting on {001}
Mohs Hardness
Not Available
7-8.5
Chemical Composition
(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
AlAl6O3BSi3O18
Londonite and Dumortierite Chemical Formula
While comparing Londonite and Dumortierite 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 Londonite and Dumortierite chemical formula.
- Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
Londonite and Dumortierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Londonite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Londonite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Londonite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.