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Common Opal
Common Opal

Oligoclase
Oligoclase



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Common Opal
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Oligoclase

Common Opal and Oligoclase Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.98-2.50
Conchoidal
None
5.5-6.5
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
 
-
-
-
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)

Common Opal and Oligoclase Chemical Formula

While comparing Common Opal 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 Common Opal and Oligoclase chemical formula.

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Common Opal and Oligoclase Specific Gravity

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