Almandine and Hematite Physical Properties

Almandine

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

3.95-4.305.00-5.30

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

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

1.6 Cleavage

none

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

1.7 Mohs Hardness

7-7.56

2 10

1.8 Chemical Composition

Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Fe 2O 3Arthur Thomas , Gemstones (2009)

Almandine and Hematite Chemical Formula

While comparing Almandine 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 Almandine and Hematite chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)

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Almandine and Hematite Specific Gravity

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