Neptunite and Black Opal Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.19-3.23
1.97-2.22
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
{110} good
Not Available
Chemical Composition
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
SiO 2 + H 2OUlrich Henn and Claudio C.
Neptunite and Black Opal Chemical Formula
While comparing Neptunite and Black 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 Black Opal chemical formula.
- Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Neptunite and Black Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Neptunite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Neptunite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Neptunite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.