Precious Opal and Oligoclase Physical Properties

Precious Opal

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

1.98-2.252.62-2.67

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references

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

1.6 Cleavage

Not Available

From the Greek, oligos and kasein, little cleavage.

1.7 Mohs Hardness

5-6.56-6.5

2 10

1.8 Chemical Composition

SiO 2 · nH 2OGemdat.org , Management Team (2012)

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

Precious Opal and Oligoclase Chemical Formula

While comparing Precious 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 Precious Opal and Oligoclase chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

Precious Opal Vs Sardonyx

Precious Opal Vs Sapphire

Precious Opal Vs Sard

Precious Opal and Oligoclase Specific Gravity

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