Hematite and Sellaite Physical Properties

Hematite

Sellaite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

5.00-5.303.14-3.16

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle

1.6 Cleavage

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

Perfect on {010} and {110}

1.7 Mohs Hardness

65-5.5

2 10

1.8 Chemical Composition

Fe 2O 3Arthur Thomas , Gemstones (2009)

MgF 2Ulrich Henn and Claudio C.

Hematite and Sellaite Chemical Formula

While comparing Hematite and Sellaite 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 Hematite and Sellaite chemical formula.

Chemical formula of Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.

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Hematite and Sellaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hematite and Sellaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hematite and Sellaite Optical Properties during the identification of gemstone. Specific gravity of Hematite is 3.14-3.16 whereas that of Sellaite is 3.14-3.16.