Turquoise and Lapis lazuli Physical Properties
Tenacity
Not Available
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.30-2.90
2.50-3.00
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Good to perfect_usually N/A
3,6
Chemical Composition
CuAl6(PO4)4(OH)8 • 4H2O
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
Turquoise and Lapis lazuli Chemical Formula
While comparing Turquoise and Lapis lazuli 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 Lapis lazuli chemical formula.
- Chemical formula of Turquoise- CuAl6(PO4)4(OH)8 • 4H2O
- Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
Turquoise and Lapis lazuli Specific Gravity
Another important criteria for qualitative analysis of gemstones is Turquoise and Lapis lazuli Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Lapis lazuli Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 2.50-3.00 whereas that of Lapis lazuli is 2.50-3.00.