Lapis lazuli and Albite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.50-3.00
2.60-2.65
Fracture
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
Cleavage
3,6
Perfect on {001}, very good on {010}, imperfect on {110}
Chemical Composition
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Lapis lazuli and Albite Chemical Formula
While comparing Lapis lazuli and Albite 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 Albite 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 Albite- NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Lapis lazuli and Albite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Lapis lazuli and Albite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lapis lazuli and Albite Optical Properties during the identification of gemstone. Specific gravity of Lapis lazuli is 2.60-2.65 whereas that of Albite is 2.60-2.65.