Chiastolite and Lapis lazuli Physical Properties

Chiastolite and Lapis lazuli Chemical Formula

While comparing Chiastolite 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 Chiastolite and Lapis lazuli chemical formula.

• Chemical formula of Chiastolite- Al 2SiO 5Michael 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

Chiastolite and Lapis lazuli Specific Gravity

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