Purpurite and Amethyst Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
insoluble in common solvents
Durability
Not Available
Not Available
Specific Gravity
3.2-3.4
2.65
Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
[100] [001] perfect
Indiscernible
Chemical Composition
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
SiO2
Purpurite and Amethyst Chemical Formula
While comparing Purpurite and Amethyst 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 Amethyst chemical formula.
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Amethyst- SiO2
Purpurite and Amethyst Specific Gravity
Another important criteria for qualitative analysis of gemstones is Purpurite and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Purpurite and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Purpurite is 2.65 whereas that of Amethyst is 2.65.