Dallasite and Nepheline Physical Properties

Dallasite

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

2.58-2.912.55-2.65

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

[1010] Poor

1.7 Mohs Hardness

6.5-75-6

2 10

1.8 Chemical Composition

Not Available

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

Dallasite and Nepheline Chemical Formula

While comparing Dallasite 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 Dallasite and Nepheline chemical formula.

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

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Dallasite and Nepheline Specific Gravity

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