Rock Crystal and Lapis lazuli Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.65
2.50-3.00
Fracture
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Not Available
3,6
Chemical Composition
SiO 2Walter Schumann , Gemstones of the world (2001)
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
Rock Crystal and Lapis lazuli Chemical Formula
While comparing Rock Crystal 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 Rock Crystal and Lapis lazuli chemical formula.
- Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)
- Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
Rock Crystal and Lapis lazuli Specific Gravity
Another important criteria for qualitative analysis of gemstones is Rock Crystal and Lapis lazuli Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rock Crystal and Lapis lazuli Optical Properties during the identification of gemstone. Specific gravity of Rock Crystal is 2.50-3.00 whereas that of Lapis lazuli is 2.50-3.00.