Lapis lazuli and Nuummite Physical Properties
Tenacity
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Not Available
  
Solubility
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Not Available
  
Durability
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Not Available
  
Specific Gravity
2.50-3.00
  
3.18-3.37
  
Fracture
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Conchoidal
  
Cleavage
3,6
  
Perfect on 210
  
Mohs Hardness
5.5
  
5.5-6
  
Chemical Composition
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 Nuummite Chemical Formula
While comparing Lapis lazuli and Nuummite 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 Nuummite 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 Nuummite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Lapis lazuli and Nuummite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lapis lazuli and Nuummite Optical Properties during the identification of gemstone. Specific gravity of Lapis lazuli is 3.18-3.37 whereas that of Nuummite is 3.18-3.37.