Alexandrite and Nepheline Physical Properties

Alexandrite

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

3.69-3.812.55-2.65

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

1,1 ; 3,2.

[1010] Poor

1.7 Mohs Hardness

8.55-6

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

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

Alexandrite and Nepheline Chemical Formula

While comparing Alexandrite 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 Alexandrite and Nepheline chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

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Alexandrite and Nepheline Specific Gravity

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