Adularia and Lapis lazuli Physical Properties

Adularia and Lapis lazuli Chemical Formula

While comparing Adularia 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 Adularia and Lapis lazuli chemical formula.

• Chemical formula of Adularia- KAlSi 3O 8Michael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)₈Al₆Si₆O₂₄(S,SO)₄

Adularia and Lapis lazuli Specific Gravity

Another important criteria for qualitative analysis of gemstones is Adularia and Lapis lazuli Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Adularia and Lapis lazuli Optical Properties during the identification of gemstone. Specific gravity of Adularia is 2.50-3.00 whereas that of Lapis lazuli is 2.50-3.00.