Nepheline and Crystal Opal Physical Properties

Nepheline

Crystal Opal

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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

2.55-2.651.97-2.22

1 7.18

1.5 Fracture

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

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

[1010] Poor

Not Available

1.7 Mohs Hardness

5-65.5-6.5

2 10

1.8 Chemical Composition

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

SiO 2 + H 2OUlrich Henn and Claudio C.

Nepheline and Crystal Opal Chemical Formula

While comparing Nepheline and Crystal Opal 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 Crystal Opal chemical formula.

Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Nepheline and Crystal Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nepheline and Crystal Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nepheline and Crystal Opal Optical Properties during the identification of gemstone. Specific gravity of Nepheline is 1.97-2.22 whereas that of Crystal Opal is 1.97-2.22.