Corundum and Brucite Physical Properties

Corundum

Brucite

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1 Physical Properties

1.1 Tenacity

Brittle

Sectile

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.90-4.052.39

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Difficult, Fibrous

Irregular

1.6 Cleavage

None – parting in 3 directions

Perfect on {0001}

1.7 Mohs Hardness

92.5

2 10

1.8 Chemical Composition

Al 2O 3Arthur Thomas , Gemstones (2009)

Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Corundum and Brucite Chemical Formula

While comparing Corundum and Brucite 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 Brucite chemical formula.

Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Brucite- Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Corundum and Brucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Brucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Brucite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2.39 whereas that of Brucite is 2.39.