Spinel and Purpurite Physical Properties
Tenacity
Not Available
Not Available
Solubility
none
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.64-3.66
3.2-3.4
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
None, but may exhibit slight parting
[100] [001] perfect
Chemical Composition
MgAl2O4
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Spinel and Purpurite Chemical Formula
While comparing Spinel 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 Spinel and Purpurite chemical formula.
- Chemical formula of Spinel- MgAl2O4
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Spinel and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Spinel and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.