Nepheline and Goethite Physical Properties

Nepheline

Goethite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

HCl soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.654.27-4.29

1 7.18

1.5 Fracture

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

Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).

1.6 Cleavage

[1010] Poor

Perfect {010}

1.7 Mohs Hardness

5-65-5.5

2 10

1.8 Chemical Composition

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

FeO(OH)Arthur Thomas , Gemstones (2009)

Nepheline and Goethite Chemical Formula

While comparing Nepheline and Goethite 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 Goethite chemical formula.

Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Nepheline and Goethite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nepheline and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nepheline and Goethite Optical Properties during the identification of gemstone. Specific gravity of Nepheline is 4.27-4.29 whereas that of Goethite is 4.27-4.29.