Neptunite and Opal Physical Properties
Tenacity
Brittle
BrittleWalter Schumann
Solubility
Not Available
hot salt water
Durability
Not Available
Not Available
Specific Gravity
3.19-3.23
1.98-2.25
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Chemical Composition
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
SiO2 · nH2O
Neptunite and Opal Chemical Formula
While comparing Neptunite and Opal 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 Opal chemical formula.
- Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Opal- SiO2 · nH2O
Neptunite and Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Neptunite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Neptunite and Opal Optical Properties during the identification of gemstone. Specific gravity of Neptunite is 1.98-2.25 whereas that of Opal is 1.98-2.25.