Cordierite and Franklinite Physical Properties

Cordierite

Franklinite

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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

2.57-2.665.05-5.22

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)

1.6 Cleavage

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

None

1.7 Mohs Hardness

7-7.55.5-6

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

Cordierite and Franklinite Chemical Formula

While comparing Cordierite and Franklinite 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 Franklinite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Franklinite- (Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

Compare Blue Gemstones

Cordierite Vs Riebeckite

Cordierite Vs Rosasite

Cordierite Vs Plumbogummite

Cordierite and Franklinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Franklinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Franklinite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 5.05-5.22 whereas that of Franklinite is 5.05-5.22.