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Lazurite and Pumpellyite Physical Properties


Pumpellyite and Lazurite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Soluble   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.75   
3.20-3.30   

Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle   
Not Available   

Cleavage
Imperfect on {110}   
Not Available   

Mohs Hardness
5.5   
5-6   

Chemical Composition
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.   
Ca 2(Mg,Fe,Mn,Al) 2(SiO 4)(Si 2O 7)(OH) 2 · H 2OUlrich Henn and Claudio C.   

Optical Properties >>
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Lazurite and Pumpellyite Chemical Formula

While comparing Lazurite and Pumpellyite 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 Lazurite and Pumpellyite chemical formula.

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Lazurite and Pumpellyite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazurite and Pumpellyite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazurite and Pumpellyite Optical Properties during the identification of gemstone. Specific gravity of Lazurite is 3.20-3.30 whereas that of Pumpellyite is 3.20-3.30.

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