Lapis lazuli and Spinel Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
none
Durability
Not Available
Not Available
Specific Gravity
2.50-3.00
3.64-3.66
Fracture
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
3,6
None, but may exhibit slight parting
Chemical Composition
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
MgAl2O4
Lapis lazuli and Spinel Chemical Formula
While comparing Lapis lazuli and Spinel 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 Lapis lazuli and Spinel chemical formula.
- Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
- Chemical formula of Spinel- MgAl2O4
Lapis lazuli and Spinel Specific Gravity
Another important criteria for qualitative analysis of gemstones is Lapis lazuli and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lapis lazuli and Spinel Optical Properties during the identification of gemstone. Specific gravity of Lapis lazuli is 3.64-3.66 whereas that of Spinel is 3.64-3.66.