Corundum and Hauyne Physical Properties

Corundum

Hauyne

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

insoluble

Gelatinises in acids

1.3 Durability

Not Available

1.4 Specific Gravity

3.90-4.052.4-2.5

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Difficult, Fibrous

Uneven, Conchoidal, Brittle

1.6 Cleavage

None – parting in 3 directions

Distinct on {110}

1.7 Mohs Hardness

95-6

2 10

1.8 Chemical Composition

Al 2O 3Arthur Thomas , Gemstones (2009)

(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2

Corundum and Hauyne Chemical Formula

While comparing Corundum and Hauyne 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 Hauyne chemical formula.

Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Hauyne- (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2

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Corundum and Hauyne Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Hauyne Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Hauyne Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2.4-2.5 whereas that of Hauyne is 2.4-2.5.