Lazulite and Sodalite Physical Properties

Lazulite

Sodalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.04-3.172.15-2.40

1 7.18

1.15 Fracture

Uneven, Uneven, Gemstones of the world (2001) More from other references

Conchoidal, Uneven, UnevenArthur Thomas, Brittle

1.16 Cleavage

{001} Indistinct, {???} Indistinct

Poor on {110}

1.17 Mohs Hardness

5.55-6

2 10

1.21 Chemical Composition

(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

Na₈Al₆Si₆O₂₄Cl₂

Lazulite and Sodalite Chemical Formula

While comparing Lazulite and Sodalite 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 Lazulite and Sodalite chemical formula.

Chemical formula of Lazulite- (Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Chemical formula of Sodalite- Na₈Al₆Si₆O₂₄Cl₂

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Lazulite and Sodalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazulite and Sodalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazulite and Sodalite Optical Properties during the identification of gemstone. Specific gravity of Lazulite is 2.15-2.40 whereas that of Sodalite is 2.15-2.40.