Almandine and Nepheline Physical Properties

Almandine

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

3.95-4.30

2.55-2.65

1.5 Fracture

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

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

1.6 Cleavage

none

[1010] Poor

1.7 Mohs Hardness

7-7.5

5-6

1.8 Chemical Composition

Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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

Almandine and Nepheline Chemical Formula

While comparing Almandine 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 Almandine and Nepheline chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

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Almandine and Nepheline Specific Gravity

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