Howlite and Sapphire Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
insoluble
Durability
Not Available
Not Available
Specific Gravity
2.45-2.58
3.95-4.03
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Uneven, Uneven, Gems, Sixth Edition (2006)
Cleavage
None
None, but may exhibit parting
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2 O 3
Howlite and Sapphire Chemical Formula
While comparing Howlite and Sapphire 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 Sapphire chemical formula.
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Sapphire- Al 2 O 3
Howlite and Sapphire Specific Gravity
Another important criteria for qualitative analysis of gemstones is Howlite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Howlite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.