Spinel and Howlite Physical Properties
Tenacity
Not Available
Not Available
Solubility
none
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.64-3.66
2.45-2.58
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
None, but may exhibit slight parting
None
Chemical Composition
MgAl2O4
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Spinel and Howlite Chemical Formula
While comparing Spinel and Howlite 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 Spinel and Howlite chemical formula.
- Chemical formula of Spinel- MgAl2O4
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Spinel and Howlite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Spinel and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Howlite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 2.45-2.58 whereas that of Howlite is 2.45-2.58.