Purpurite and Neptunite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.2-3.4
3.19-3.23
Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Cleavage
[100] [001] perfect
{110} good
Chemical Composition
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Purpurite and Neptunite Chemical Formula
While comparing Purpurite 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 Purpurite and Neptunite chemical formula.
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Purpurite and Neptunite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Purpurite and Neptunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Purpurite and Neptunite Optical Properties during the identification of gemstone. Specific gravity of Purpurite is 3.19-3.23 whereas that of Neptunite is 3.19-3.23.