Cordierite and Jet Physical Properties

Cordierite

Jet

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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

2.57-2.66

1.19-1.35

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

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

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

7-7.5

2.5-4

1.8 Chemical Composition

Mg2Al4Si5O18

Not Available

Cordierite and Jet Chemical Formula

While comparing Cordierite and Jet 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 Jet chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18

Compare Blue Gemstones

Cordierite Vs Rosasite

Cordierite Vs Plumbogummite

Cordierite Vs Riebeckite

Cordierite and Jet Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Jet Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Jet Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 1.19-1.35 whereas that of Jet is 1.19-1.35.

Blue Gemstones

Glaucophane

Hauyne

Kainite

Lawsonite

Plumbogummite

Riebeckite