Corundum and Gahnospinel Physical Properties

Corundum

Gahnospinel

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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

3.90-4.053.65-4.55

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Difficult, Fibrous

ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

None – parting in 3 directions

None, but may exhibit slight parting

1.7 Mohs Hardness

97.5-8

2 10

1.8 Chemical Composition

Al 2O 3Arthur Thomas , Gemstones (2009)

(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

Corundum and Gahnospinel Chemical Formula

While comparing Corundum and Gahnospinel 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 Gahnospinel chemical formula.

Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Gahnospinel- (Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

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Corundum and Gahnospinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Gahnospinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Gahnospinel Optical Properties during the identification of gemstone. Specific gravity of Corundum is 3.65-4.55 whereas that of Gahnospinel is 3.65-4.55.