Spinel and Neptunite Physical Properties
Tenacity
Not Available
Brittle
Solubility
none
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.64-3.66
3.19-3.23
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Cleavage
None, but may exhibit slight parting
{110} good
Chemical Composition
MgAl2O4
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Spinel and Neptunite Chemical Formula
While comparing Spinel and Neptunite 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 Neptunite chemical formula.
- Chemical formula of Spinel- MgAl2O4
- Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Spinel and Neptunite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Spinel and Neptunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Neptunite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 3.19-3.23 whereas that of Neptunite is 3.19-3.23.