Nepheline and Emerald Physical Properties

Nepheline

Emerald

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

Hard

1.4 Specific Gravity

2.55-2.65

2.67-2.78

1.5 Fracture

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

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

[1010] Poor

Imperfect on the [0001]

1.7 Mohs Hardness

5-6

7.5-8

1.8 Chemical Composition

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

Be₃Al₂SiO₆

Nepheline and Emerald Chemical Formula

While comparing Nepheline and Emerald 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 Emerald chemical formula.

Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Chemical formula of Emerald- Be₃Al₂SiO₆

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Nepheline and Emerald Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nepheline and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nepheline and Emerald Optical Properties during the identification of gemstone. Specific gravity of Nepheline is 2.67-2.78 whereas that of Emerald is 2.67-2.78.