Nepheline and Bytownite Physical Properties

Nepheline

Bytownite

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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

2.55-2.652.72-2.75

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

[1010] Poor

Perfect on [001], good on [010], imperfect on [110]

1.7 Mohs Hardness

5-66-6.5

2 10

1.8 Chemical Composition

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

Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Nepheline and Bytownite Chemical Formula

While comparing Nepheline and Bytownite 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 Bytownite chemical formula.

Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Chemical formula of Bytownite- Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Nepheline and Bytownite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nepheline and Bytownite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nepheline and Bytownite Optical Properties during the identification of gemstone. Specific gravity of Nepheline is 2.72-2.75 whereas that of Bytownite is 2.72-2.75.