Lapis lazuli and Apatite Physical Properties

Lapis lazuli and Apatite Chemical Formula

While comparing Lapis lazuli and Apatite 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 Apatite 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 Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

Lapis lazuli and Apatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lapis lazuli and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lapis lazuli and Apatite Optical Properties during the identification of gemstone. Specific gravity of Lapis lazuli is 3.16-3.23 whereas that of Apatite is 3.16-3.23.