Lapis lazuli and Plumbogummite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.50-3.00
  
4.014
  
Fracture
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Uneven, Conchoidal
  
Cleavage
3,6
  
None
  
Mohs Hardness
5.5
  
4-5
  
Chemical Composition
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
  
Not Available
  
Lapis lazuli and Plumbogummite Chemical Formula
While comparing Lapis lazuli and Plumbogummite 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 Plumbogummite 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 Plumbogummite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Lapis lazuli and Plumbogummite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lapis lazuli and Plumbogummite Optical Properties during the identification of gemstone. Specific gravity of Lapis lazuli is 4.014 whereas that of Plumbogummite is 4.014.