Vesuvianite and Lazurite Physical Properties

Vesuvianite

Lazurite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Vesuvianite is virtually insolouble in acids

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.32-3.432.75

1 7.18

1.5 Fracture

Conchoidal, Brittle

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

1.6 Cleavage

Poor on {110} and {100} very poor on {001}

Imperfect on {110}

1.7 Mohs Hardness

6-75.5

2 10

1.8 Chemical Composition

Not Available

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

Vesuvianite and Lazurite Chemical Formula

While comparing Vesuvianite 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 Vesuvianite and Lazurite chemical formula.

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

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Vesuvianite and Lazurite Specific Gravity

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