Gahnite and Corundum Physical Properties

Gahnite

Corundum

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

4.00-4.623.90-4.05

1 7.18

1.5 Fracture

Conchoidal, Uneven

Uneven, Uneven, Gems, Difficult, Fibrous

1.6 Cleavage

Indistinct parting on [111]

None – parting in 3 directions

1.7 Mohs Hardness

7.5-89

2 10

1.8 Chemical Composition

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Al 2O 3Arthur Thomas , Gemstones (2009)

Gahnite and Corundum Chemical Formula

While comparing Gahnite and Corundum 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 Gahnite and Corundum chemical formula.

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

Compare Blue Gemstones

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Gahnite Vs Hydrogrossular

Gahnite and Corundum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Corundum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Corundum Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 3.90-4.05 whereas that of Corundum is 3.90-4.05.