Anhydrite and Corundum Physical Properties

Anhydrite

Corundum

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-2.983.90-4.05

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Uneven, Uneven, Gems, Difficult, Fibrous

1.6 Cleavage

Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.

None – parting in 3 directions

1.7 Mohs Hardness

3.59

2 10

1.8 Chemical Composition

CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Al 2O 3Arthur Thomas , Gemstones (2009)

Anhydrite and Corundum Chemical Formula

While comparing Anhydrite and Corundum 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 Anhydrite and Corundum chemical formula.

Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)

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Anhydrite and Corundum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anhydrite and Corundum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anhydrite and Corundum Optical Properties during the identification of gemstone. Specific gravity of Anhydrite is 3.90-4.05 whereas that of Corundum is 3.90-4.05.