Howlite and Hardystonite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.45-2.58
3.396-3.443
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Brittle, Metallic
Cleavage
None
[001] good, [100] and [110] fair
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
Howlite and Hardystonite Chemical Formula
While comparing Howlite and Hardystonite 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 Hardystonite chemical formula.
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
Howlite and Hardystonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Howlite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Howlite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.