Achroite and Hematite Physical Properties

Achroite

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

2.90-3.405.00-5.30

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

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

7-7.56

2 10

1.8 Chemical Composition

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Fe 2O 3Arthur Thomas , Gemstones (2009)

Achroite and Hematite Chemical Formula

While comparing Achroite 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 Achroite and Hematite chemical formula.

Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Chemical formula of Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)

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Achroite and Hematite Specific Gravity

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