Plumbogummite and Lazurite Physical Properties

Plumbogummite

Lazurite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

4.0142.75

1 7.18

1.5 Fracture

Uneven, Conchoidal

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

1.6 Cleavage

None

Imperfect on {110}

1.7 Mohs Hardness

4-55.5

2 10

1.8 Chemical Composition

Not Available

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

Plumbogummite and Lazurite Chemical Formula

While comparing Plumbogummite 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 Plumbogummite 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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Plumbogummite and Lazurite Specific Gravity

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