Neptunite and Petalite Physical Properties
Solubility
Not Available
insoluble
Durability
Not Available
Not Available
Specific Gravity
3.19-3.23
2.40
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Cleavage
{110} good
Perfect on {001}, poor on {201} with 38.5° angle between the two
Chemical Composition
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Neptunite and Petalite Chemical Formula
While comparing Neptunite and Petalite 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 Petalite chemical formula.
- Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Neptunite and Petalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Neptunite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Neptunite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Neptunite is 2.40 whereas that of Petalite is 2.40.