Lapis lazuli and London blue topaz Physical Properties

Lapis lazuli and London blue topaz Chemical Formula

While comparing Lapis lazuli and London blue topaz 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 London blue topaz 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
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Lapis lazuli and London blue topaz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lapis lazuli and London blue topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lapis lazuli and London blue topaz Optical Properties during the identification of gemstone. Specific gravity of Lapis lazuli is Not Available whereas that of London blue topaz is Not Available.