Rutile and Achroite Physical Properties

Rutile

Achroite

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Physical Properties

Tenacity

Solubility

Insoluble in acids

Durability

Specific Gravity

4.20-4.302.90-3.40

1 7.18

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Fracture

Uneven, Conchoidal

Uneven, ConchoidalWalter Schumann

Cleavage

{110} good, 100 moderate, parting on {092} and {011}

Indiscernible

Mohs Hardness

6-6.57-7.5

2 10

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Chemical Composition

TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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.

Rutile and Achroite Chemical Formula

While comparing Rutile and Achroite 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 Rutile and Achroite chemical formula.

Chemical formula of Rutile- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
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.

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Rutile and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rutile and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rutile and Achroite Optical Properties during the identification of gemstone. Specific gravity of Rutile is 2.90-3.40 whereas that of Achroite is 2.90-3.40.