Turquoise and Purpurite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.30-2.90
3.2-3.4
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
Good to perfect_usually N/A
[100] [001] perfect
Chemical Composition
CuAl6(PO4)4(OH)8 • 4H2O
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Turquoise and Purpurite Chemical Formula
While comparing Turquoise 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 Turquoise and Purpurite chemical formula.
- Chemical formula of Turquoise- CuAl6(PO4)4(OH)8 • 4H2O
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Turquoise and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Turquoise and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.