Lapis lazuli and Cordierite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.50-3.00
2.57-2.66
Fracture
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Subconchoidal, Conchoidal, Brittle
Cleavage
3,6
Fair on {100}, poor on {001} and {010}
Chemical Composition
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
Mg2Al4Si5O18
Lapis lazuli and Cordierite Chemical Formula
While comparing Lapis lazuli and Cordierite 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 Cordierite 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 Cordierite- Mg2Al4Si5O18
Lapis lazuli and Cordierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Lapis lazuli and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lapis lazuli and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Lapis lazuli is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.