Howlite and Dumortierite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.45-2.58
3.26-3.41
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), 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
3-3.5
7-8.5
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
AlAl6O3BSi3O18
Howlite and Dumortierite Chemical Formula
While comparing Howlite 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 Howlite and Dumortierite chemical formula.
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
Howlite and Dumortierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Howlite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Howlite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.