Howlite and Cordierite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.45-2.58
2.57-2.66
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Subconchoidal, Conchoidal, Brittle
Cleavage
None
Fair on {100}, poor on {001} and {010}
Mohs Hardness
3-3.5
7-7.5
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Mg2Al4Si5O18
Howlite and Cordierite Chemical Formula
While comparing Howlite and Cordierite 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 Cordierite chemical formula.
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Cordierite- Mg2Al4Si5O18
Howlite and Cordierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Howlite and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Howlite is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.