Corundum and Fluorite Physical Properties

Corundum

Fluorite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

insoluble

slightly water soluble and in hot hydrochloric acid

1.3 Durability

Not Available

1.4 Specific Gravity

3.90-4.053.00-3.25

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Difficult, Fibrous

Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

1.6 Cleavage

None – parting in 3 directions

Octahedral, perfect on {111}, parting on {011}

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

Al 2O 3Arthur Thomas , Gemstones (2009)

CaF₂

Corundum and Fluorite Chemical Formula

While comparing Corundum and Fluorite 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 Fluorite chemical formula.

Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Fluorite- CaF₂

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Corundum and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.