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Iolite
Iolite

Lapis lazuli
Lapis lazuli



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Lapis lazuli

Iolite and Lapis lazuli Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.6-2.7
2.50-3.00
1.5 Fracture
Not Available
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
1.6 Cleavage
3,1
3,6
1.7 Mohs Hardness
7-7.5
5.5
1.8 Chemical Composition
Mg2Al4Si5O18
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4

Iolite and Lapis lazuli Chemical Formula

While comparing Iolite 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 Iolite and Lapis lazuli chemical formula.

  • Chemical formula of Iolite- Mg2Al4Si5O18
  • Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4

Iolite and Lapis lazuli Specific Gravity

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