Corundum and Powellite Physical Properties

Corundum

Powellite

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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

3.90-4.054.23

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Difficult, Fibrous

UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

1.6 Cleavage

None – parting in 3 directions

{111} Distinct

1.7 Mohs Hardness

93.5-4

2 10

1.8 Chemical Composition

Al 2O 3Arthur Thomas , Gemstones (2009)

CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Corundum and Powellite Chemical Formula

While comparing Corundum and Powellite 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 Powellite chemical formula.

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

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Corundum and Powellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Powellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Powellite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 4.23 whereas that of Powellite is 4.23.