Cordierite and Colemanite Physical Properties

Cordierite

Colemanite

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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

2.57-2.662.40-2.42

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic

1.6 Cleavage

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

{010} Perfect, {001} Distinct

1.7 Mohs Hardness

7-7.54.5

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

Ca 2B 6O 11 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Cordierite and Colemanite Chemical Formula

While comparing Cordierite and Colemanite 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 Colemanite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Colemanite- Ca 2B 6O 11 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Cordierite and Colemanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Colemanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Colemanite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.40-2.42 whereas that of Colemanite is 2.40-2.42.