Pyrophyllite and Oligoclase Physical Properties

Pyrophyllite

Oligoclase

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.65-2.902.62-2.67

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

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

1.6 Cleavage

{001} Perfect

From the Greek, oligos and kasein, little cleavage.

1.7 Mohs Hardness

Not Available6-6.5

2 10

1.8 Chemical Composition

Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Pyrophyllite and Oligoclase Chemical Formula

While comparing Pyrophyllite and Oligoclase 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 Pyrophyllite and Oligoclase chemical formula.

Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Pyrophyllite and Oligoclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Oligoclase Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 2.62-2.67 whereas that of Oligoclase is 2.62-2.67.