Londonite and Cordierite Iolite Physical Properties

Londonite

Cordierite Iolite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.342.56-2.66

1 7.18

1.5 Fracture

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

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

None

Not Available

1.7 Mohs Hardness

Not Available7-7.5

2 10

1.8 Chemical Composition

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

Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.

Londonite and Cordierite Iolite Chemical Formula

While comparing Londonite and Cordierite Iolite 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 Londonite and Cordierite Iolite chemical formula.

Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Cordierite Iolite- Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.

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Londonite and Cordierite Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Londonite and Cordierite Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Londonite and Cordierite Iolite Optical Properties during the identification of gemstone. Specific gravity of Londonite is 2.56-2.66 whereas that of Cordierite Iolite is 2.56-2.66.