Nepheline and Gahnite Physical Properties

Nepheline

Gahnite

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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

2.55-2.654.00-4.62

1 7.18

1.5 Fracture

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

Conchoidal, Uneven

1.6 Cleavage

[1010] Poor

Indistinct parting on [111]

1.7 Mohs Hardness

5-67.5-8

2 10

1.8 Chemical Composition

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

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Nepheline and Gahnite Chemical Formula

While comparing Nepheline and Gahnite 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 Gahnite chemical formula.

Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Nepheline and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nepheline and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nepheline and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Nepheline is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.