Amethyst and Neptunite Physical Properties
Tenacity
Not Available
Brittle
Solubility
insoluble in common solvents
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.65
3.19-3.23
Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Cleavage
Indiscernible
{110} good
Chemical Composition
SiO2
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Amethyst and Neptunite Chemical Formula
While comparing Amethyst 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 Amethyst and Neptunite chemical formula.
- Chemical formula of Amethyst- SiO2
- Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Amethyst and Neptunite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Amethyst and Neptunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Amethyst and Neptunite Optical Properties during the identification of gemstone. Specific gravity of Amethyst is 3.19-3.23 whereas that of Neptunite is 3.19-3.23.