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Pyrargyrite and Lazurite Physical Properties


Lazurite and Pyrargyrite Physical Properties


Physical Properties

Tenacity
Brittle   
Brittle   

Solubility
Not Available   
Soluble   

Durability
Not Available   
Not Available   

Specific Gravity
5.85   
2.75   

Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Brittle   
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle   

Cleavage
Distinct on {10 1 1}, imperfect on {01 1 2}   
Imperfect on {110}   

Mohs Hardness
2.5-3   
5.5   

Chemical Composition
Ag 3SbS 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.   

Optical Properties >>
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Pyrargyrite and Lazurite Chemical Formula

While comparing Pyrargyrite and Lazurite 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 Pyrargyrite and Lazurite chemical formula.

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Pyrargyrite and Lazurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrargyrite and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrargyrite and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Pyrargyrite is 2.75 whereas that of Lazurite is 2.75.

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