Sugilite and Cordierite Physical Properties

Sugilite

Cordierite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.69-2.792.57-2.66

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

Poor on {0001}

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

1.7 Mohs Hardness

5.5-6.57-7.5

2 10

1.8 Chemical Composition

KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Mg2Al4Si5O18

Sugilite and Cordierite Chemical Formula

While comparing Sugilite and Cordierite 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 Sugilite and Cordierite chemical formula.

Chemical formula of Sugilite- KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Cordierite- Mg2Al4Si5O18

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Sugilite and Cordierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sugilite and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sugilite and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Sugilite is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.