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