Vishnevite and Nepheline Physical Properties

Vishnevite

Nepheline

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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

Not Available2.55-2.65

1 7.18

1.5 Fracture

Brittle, Uneven

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

1.6 Cleavage

Perfect

[1010] Poor

1.7 Mohs Hardness

5-65-6

2 10

1.8 Chemical Composition

Not Available

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

Vishnevite and Nepheline Chemical Formula

While comparing Vishnevite and Nepheline 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 Vishnevite and Nepheline chemical formula.

Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

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Vishnevite and Nepheline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vishnevite and Nepheline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vishnevite and Nepheline Optical Properties during the identification of gemstone. Specific gravity of Vishnevite is 2.55-2.65 whereas that of Nepheline is 2.55-2.65.