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Opal
Opal

Orthoclase
Orthoclase



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Opal
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Orthoclase

Opal and Orthoclase Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
BrittleWalter Schumann
hot salt water
-
1.98-2.25
Conchoidal
None
5-6.5
SiO2 · nH2O
 
-
-
-
2.54-2.61
Uneven
Has perfect cleavage on {001} and good cleavage on {010}. Cleavages intersect at 90°.
6
KAlSi 3O 8Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Opal and Orthoclase Chemical Formula

While comparing Opal and Orthoclase 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 Opal and Orthoclase chemical formula.

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Opal and Orthoclase Specific Gravity

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