Neptunite and Star Sapphire Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.19-3.23
3.90-4.05
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Not Available
Cleavage
{110} good
Not Available
Mohs Hardness
5-6
Not Available
Chemical Composition
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 2O 3Ulrich Henn and Claudio C.
Neptunite and Star Sapphire Chemical Formula
While comparing Neptunite and Star 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 Neptunite and Star Sapphire chemical formula.
- Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
Neptunite and Star Sapphire Specific Gravity
Another important criteria for qualitative analysis of gemstones is Neptunite and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Neptunite and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Neptunite is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.