Oligoclase and Cordierite Physical Properties

Oligoclase

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

2.62-2.672.57-2.66

1 7.18

1.5 Fracture

Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

From the Greek, oligos and kasein, little cleavage.

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

1.7 Mohs Hardness

6-6.57-7.5

2 10

1.8 Chemical Composition

Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Mg2Al4Si5O18

Oligoclase and Cordierite Chemical Formula

While comparing Oligoclase 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 Oligoclase and Cordierite chemical formula.

Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Cordierite- Mg2Al4Si5O18

Compare Colorless Gems

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Oligoclase Vs Phosphophyllite

Oligoclase and Cordierite Specific Gravity

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