Cordierite and Londonite Physical Properties

Cordierite

Londonite

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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

2.57-2.663.34

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

1.6 Cleavage

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

None

1.7 Mohs Hardness

7-7.5Not Available

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)

Cordierite and Londonite Chemical Formula

While comparing Cordierite and Londonite 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 Londonite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)

Compare Blue Gemstones

Cordierite Vs Rosasite

Cordierite Vs Plumbogummite

Cordierite Vs Riebeckite

Cordierite and Londonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Londonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Londonite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.34 whereas that of Londonite is 3.34.