Tanzanite and Lapis lazuli Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Hard
Not Available
Specific Gravity
3.35
2.50-3.00
Fracture
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Perfect {010}, imperfect {100}
3,6
Chemical Composition
Ca2Al3(SiO4)3(OH)
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
Tanzanite and Lapis lazuli Chemical Formula
While comparing Tanzanite 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 Tanzanite and Lapis lazuli chemical formula.
- Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)
- Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
Tanzanite and Lapis lazuli Specific Gravity
Another important criteria for qualitative analysis of gemstones is Tanzanite and Lapis lazuli Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Lapis lazuli Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 2.50-3.00 whereas that of Lapis lazuli is 2.50-3.00.