Howlite and Vlasovite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Nearly insoluble in HCl and HNO3
Durability
Not Available
Not Available
Specific Gravity
2.45-2.58
2.97
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal, Brittle
Cleavage
None
Distinct on {010}
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Not Available
Howlite and Vlasovite Chemical Formula
While comparing Howlite and Vlasovite 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 Vlasovite chemical formula.
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
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Howlite and Vlasovite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Howlite and Vlasovite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Vlasovite Optical Properties during the identification of gemstone. Specific gravity of Howlite is 2.97 whereas that of Vlasovite is 2.97.