Fluorite and Corundum Physical Properties

Fluorite

Corundum

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

slightly water soluble and in hot hydrochloric acid

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.00-3.253.90-4.05

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gems, Difficult, Fibrous

1.6 Cleavage

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

None – parting in 3 directions

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

CaF₂

Al 2O 3Arthur Thomas , Gemstones (2009)

Fluorite and Corundum Chemical Formula

While comparing Fluorite 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 Fluorite and Corundum chemical formula.

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

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Fluorite and Corundum Specific Gravity

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