Spinel and Rutile Physical Properties

Spinel

Rutile

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

none

Insoluble in acids

1.3 Durability

Not Available

1.4 Specific Gravity

3.64-3.664.20-4.30

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

None, but may exhibit slight parting

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

1.7 Mohs Hardness

86-6.5

2 10

1.8 Chemical Composition

MgAl₂O₄

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

Spinel and Rutile Chemical Formula

While comparing Spinel and Rutile 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 Spinel and Rutile chemical formula.

Chemical formula of Spinel- MgAl₂O₄
Chemical formula of Rutile- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Spinel and Rutile Specific Gravity

Another important criteria for qualitative analysis of gemstones is Spinel and Rutile Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Rutile Optical Properties during the identification of gemstone. Specific gravity of Spinel is 4.20-4.30 whereas that of Rutile is 4.20-4.30.