Cordierite and Fire Opal Physical Properties

Cordierite

Fire Opal

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.661.97-2.22

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Conchoidal, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

7-7.56-6.5

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references

Cordierite and Fire Opal Chemical Formula

While comparing Cordierite and Fire Opal 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 Fire Opal chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Fire Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references

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Cordierite and Fire Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Fire Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Fire Opal Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 1.97-2.22 whereas that of Fire Opal is 1.97-2.22.