Corundum and Fayalite Physical Properties

Corundum

Fayalite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.90-4.054.392

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Difficult, Fibrous

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

1.6 Cleavage

None – parting in 3 directions

{010} moderate, {100} imperfect

1.7 Mohs Hardness

96.5-7

2 10

1.8 Chemical Composition

Al 2O 3Arthur Thomas , Gemstones (2009)

Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Corundum and Fayalite Chemical Formula

While comparing Corundum and Fayalite 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 Corundum and Fayalite chemical formula.

Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Corundum and Fayalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Fayalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Fayalite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 4.392 whereas that of Fayalite is 4.392.