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Phlogopite
Phlogopite

Oligoclase
Oligoclase



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Phlogopite
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Oligoclase

Phlogopite and Oligoclase Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Tough
-
-
2.78-2.85
Uneven
Perfect basal (001)
2-2.5
KMg3(Si3Al)O10(F,OH)2
 
-
-
-
2.62-2.67
Uneven
From the Greek, oligos and kasein, little cleavage.
6-6.5
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Phlogopite and Oligoclase Chemical Formula

While comparing Phlogopite 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 Phlogopite and Oligoclase chemical formula.

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Phlogopite and Oligoclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phlogopite and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phlogopite Vs Oligoclase during the identification of gemstone. Specific gravity of Phlogopite is whereas that of Oligoclase is .