Neptunite and Gahnite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.19-3.23
4.00-4.62
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Conchoidal, Uneven
Cleavage
{110} good
Indistinct parting on [111]
Chemical Composition
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Neptunite and Gahnite Chemical Formula
While comparing Neptunite and Gahnite 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 Gahnite chemical formula.
- Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Neptunite and Gahnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Neptunite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Neptunite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Neptunite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.