Chalcedony and Lapis lazuli Physical Properties
Tenacity
Not Available
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.55-2.70
2.50-3.00
Fracture
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Chemical Composition
SiO2
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
Chalcedony and Lapis lazuli Chemical Formula
While comparing Chalcedony 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 Chalcedony and Lapis lazuli chemical formula.
- Chemical formula of Chalcedony- SiO2
- Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
Chalcedony and Lapis lazuli Specific Gravity
Another important criteria for qualitative analysis of gemstones is Chalcedony and Lapis lazuli Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chalcedony and Lapis lazuli Optical Properties during the identification of gemstone. Specific gravity of Chalcedony is 2.50-3.00 whereas that of Lapis lazuli is 2.50-3.00.