Apatite and Nepheline Physical Properties

Apatite

Nepheline

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

3.16-3.23

Conchoidal, Uneven, Conchoidal to uneven

[0001] indistinct, [1010] indistinct

Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

2.55-2.65

Subconchoidal, Conchoidal

[1010] Poor

5-6

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

Apatite and Nepheline Chemical Formula

While comparing Apatite 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 Apatite and Nepheline chemical formula.

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Apatite and Nepheline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Nepheline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite Vs Nepheline during the identification of gemstone. Specific gravity of Apatite is whereas that of Nepheline is .