Zinnwaldite and Lazurite Physical Properties

Zinnwaldite

Lazurite

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1 Physical Properties

1.1 Tenacity

Elastic

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.9-3.12.75

1 7.18

1.5 Fracture

Uneven

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

1.6 Cleavage

Perfect basal {001}

Imperfect on {110}

1.7 Mohs Hardness

3.5-4.05.5

2 10

1.8 Chemical Composition

Not Available

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

Zinnwaldite and Lazurite Chemical Formula

While comparing Zinnwaldite 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 Zinnwaldite 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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Zinnwaldite and Lazurite Specific Gravity

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