Riebeckite and Hematite Physical Properties

Riebeckite

Hematite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.28-3.445.00-5.30

1 7.18

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Fracture

Uneven, Splintery

Uneven, ConchoidalWalter Schumann, Conchoidal

Cleavage

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

None, may show partings on {0001} and {10 1 1}

Mohs Hardness

5.0-6.06

2 10

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Chemical Composition

Na2Fe2+3Fe3+2Si8O22(OH)2

Fe 2O 3Arthur Thomas , Gemstones (2009)

Riebeckite and Hematite Chemical Formula

While comparing Riebeckite and Hematite 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 Hematite chemical formula.

Chemical formula of Riebeckite- Na2Fe2+3Fe3+2Si8O22(OH)2
Chemical formula of Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)

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Riebeckite and Hematite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Riebeckite and Hematite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Hematite Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 5.00-5.30 whereas that of Hematite is 5.00-5.30.