Brookite and Nepheline Physical Properties

Brookite

Nepheline

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.87-4.142.55-2.65

1 7.18

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Fracture

Subconchoidal, Conchoidal

Cleavage

Poor on {120}, in traces on {001}

[1010] Poor

Mohs Hardness

5.5-65-6

2 10

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Chemical Composition

TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Brookite and Nepheline Chemical Formula

While comparing Brookite 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 Brookite and Nepheline chemical formula.

Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

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Brookite and Nepheline Specific Gravity

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