Cordierite and Brazilianite Physical Properties

Cordierite

Brazilianite

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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

2.57-2.662.98-2.99

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Conchoidal, Gems

1.6 Cleavage

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

(010) Distinct to good

1.7 Mohs Hardness

7-7.55.5

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

NaAl 3(PO 4) 2(OH) 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Cordierite and Brazilianite Chemical Formula

While comparing Cordierite and Brazilianite 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 Brazilianite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Brazilianite- NaAl 3(PO 4) 2(OH) 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Cordierite and Brazilianite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Brazilianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Brazilianite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.98-2.99 whereas that of Brazilianite is 2.98-2.99.