Nepheline and Realgar Physical Properties

Nepheline

Realgar

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.653.56

1 7.18

1.5 Fracture

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

(e.g. graphite).

1.6 Cleavage

[1010] Poor

{010} Good

1.7 Mohs Hardness

5-6Not Available

2 10

1.8 Chemical Composition

Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

AsSMichael OâDonoghue , Gems, Sixth Edition (2006)

Nepheline and Realgar Chemical Formula

While comparing Nepheline and Realgar 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 Nepheline and Realgar chemical formula.

Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Chemical formula of Realgar- AsSMichael OâDonoghue , Gems, Sixth Edition (2006)

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Nepheline and Realgar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nepheline and Realgar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nepheline and Realgar Optical Properties during the identification of gemstone. Specific gravity of Nepheline is 3.56 whereas that of Realgar is 3.56.