Brazilianite and Cordierite Physical Properties

Brazilianite

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

2.98-2.992.57-2.66

1 7.18

1.5 Fracture

Conchoidal, Gems

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

(010) Distinct to good

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

1.7 Mohs Hardness

5.57-7.5

2 10

1.8 Chemical Composition

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

Mg2Al4Si5O18

Brazilianite and Cordierite Chemical Formula

While comparing Brazilianite 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 Brazilianite and Cordierite chemical formula.

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

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Brazilianite and Cordierite Specific Gravity

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