Riebeckite and Brookite Physical Properties

Riebeckite

Brookite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.28-3.443.87-4.14

1 7.18

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Fracture

Uneven, Splintery

Subconchoidal, Conchoidal

Cleavage

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}

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

Mohs Hardness

5.0-6.05.5-6

2 10

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Chemical Composition

Na2Fe2+3Fe3+2Si8O22(OH)2

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

Riebeckite and Brookite Chemical Formula

While comparing Riebeckite and Brookite 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 Riebeckite and Brookite chemical formula.

Chemical formula of Riebeckite- Na2Fe2+3Fe3+2Si8O22(OH)2
Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Riebeckite and Brookite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Riebeckite and Brookite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Brookite Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 3.87-4.14 whereas that of Brookite is 3.87-4.14.