Nepheline and Covellite Physical Properties

Nepheline

Covellite

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1 Physical Properties

1.1 Tenacity

Not Available

Flexible

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.654.6-4.76

1 7.18

1.5 Fracture

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

Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic

1.6 Cleavage

[1010] Poor

Perfect on {0001}

1.7 Mohs Hardness

5-6Not Available

2 10

1.8 Chemical Composition

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

CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

Nepheline and Covellite Chemical Formula

While comparing Nepheline and Covellite 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 Covellite chemical formula.

Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Nepheline and Covellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nepheline and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nepheline and Covellite Optical Properties during the identification of gemstone. Specific gravity of Nepheline is 4.6-4.76 whereas that of Covellite is 4.6-4.76.