Umbalite and Hematite Physical Properties

Umbalite

Hematite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.62-4.33

5.00-5.30

1.5 Fracture

Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)

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

1.6 Cleavage

Not Available

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

1.7 Mohs Hardness

7-7.5

1.8 Chemical Composition

Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)

Fe 2O 3Arthur Thomas , Gemstones (2009)

Umbalite and Hematite Chemical Formula

While comparing Umbalite 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 Umbalite and Hematite chemical formula.

Chemical formula of Umbalite- Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
Chemical formula of Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)

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Umbalite and Hematite Specific Gravity

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