Realgar and Sodalite Physical Properties

Realgar

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

3.562.15-2.40

1 7.18

1.5 Fracture

(e.g. graphite).

Conchoidal, Uneven, UnevenArthur Thomas, Brittle

1.6 Cleavage

{010} Good

Poor on {110}

1.7 Mohs Hardness

Not Available5-6

2 10

1.8 Chemical Composition

AsSMichael OâDonoghue , Gems, Sixth Edition (2006)

Na₈Al₆Si₆O₂₄Cl₂

Realgar and Sodalite Chemical Formula

While comparing Realgar 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 Realgar and Sodalite chemical formula.

Chemical formula of Realgar- AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Sodalite- Na₈Al₆Si₆O₂₄Cl₂

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Realgar and Sodalite Specific Gravity

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