Cordierite and Fluorite Physical Properties

Cordierite

Fluorite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

slightly water soluble and in hot hydrochloric acid

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.66

3.00-3.25

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

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

1.6 Cleavage

Fair on {100}, poor on {001} and {010}

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

1.7 Mohs Hardness

7-7.5

1.8 Chemical Composition

Mg2Al4Si5O18

CaF₂

Cordierite and Fluorite Chemical Formula

While comparing Cordierite 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 Cordierite and Fluorite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Fluorite- CaF₂

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Cordierite and Fluorite Specific Gravity

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