Corundum and Aragonite Physical Properties

Corundum

Aragonite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

insoluble

Dilute acid

1.3 Durability

Not Available

1.4 Specific Gravity

3.90-4.052.93-2.96

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Difficult, Fibrous

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

None – parting in 3 directions

Distinct on {010}, imperfect {110} and {011}

1.7 Mohs Hardness

93.5-4

2 10

1.8 Chemical Composition

Al 2O 3Arthur Thomas , Gemstones (2009)

CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Corundum and Aragonite Chemical Formula

While comparing Corundum and Aragonite 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 Aragonite chemical formula.

Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Corundum and Aragonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Aragonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Aragonite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2.93-2.96 whereas that of Aragonite is 2.93-2.96.