Hematite and Andalusite Physical Properties

Hematite

Andalusite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

5.00-5.303.05-3.21

1 7.18

1.5 Fracture

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

Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

Good on {110}, poor on {100}

1.7 Mohs Hardness

67.5

2 10

1.8 Chemical Composition

Fe 2O 3Arthur Thomas , Gemstones (2009)

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Hematite and Andalusite Chemical Formula

While comparing Hematite and Andalusite 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 Andalusite chemical formula.

Chemical formula of Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Hematite and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hematite and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hematite and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Hematite is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.