Nepheline and Wulfenite Physical Properties

Nepheline

Wulfenite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.656.50-7.00

1 7.18

1.5 Fracture

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

Irregular, Brittle, Conchoidal

1.6 Cleavage

[1010] Poor

On {011}, distinct; on {001}, {013}, indistinct

1.7 Mohs Hardness

5-63

2 10

1.8 Chemical Composition

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

PbMoO 4Walter Schumann , Gemstones of the world (2001)

Nepheline and Wulfenite Chemical Formula

While comparing Nepheline and Wulfenite 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 Wulfenite chemical formula.

Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Chemical formula of Wulfenite- PbMoO 4Walter Schumann , Gemstones of the world (2001)

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Nepheline and Wulfenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nepheline and Wulfenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nepheline and Wulfenite Optical Properties during the identification of gemstone. Specific gravity of Nepheline is 6.50-7.00 whereas that of Wulfenite is 6.50-7.00.