Lazurite and Proustite Physical Properties

Lazurite

Proustite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.755.51-5.64

1 7.18

1.5 Fracture

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

Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Imperfect on {110}

Distinct on {10 1 1}

1.7 Mohs Hardness

5.52.5

2 10

1.8 Chemical Composition

(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

Ag 3AsS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Lazurite and Proustite Chemical Formula

While comparing Lazurite and Proustite 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 Proustite chemical formula.

Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Chemical formula of Proustite- Ag 3AsS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Lazurite and Proustite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazurite and Proustite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazurite and Proustite Optical Properties during the identification of gemstone. Specific gravity of Lazurite is 5.51-5.64 whereas that of Proustite is 5.51-5.64.