Gahnite and Purpurite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.00-4.62
3.2-3.4
Fracture
Conchoidal, Uneven
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
Indistinct parting on [111]
[100] [001] perfect
Mohs Hardness
7.5-8
4-4.5
Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Gahnite and Purpurite Chemical Formula
While comparing Gahnite and Purpurite 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 Gahnite and Purpurite chemical formula.
- Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Gahnite and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Gahnite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.