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Opal
Opal

Albite
Albite



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Opal
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Albite

Opal and Albite Physical Properties

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Physical Properties

Tenacity

BrittleWalter Schumann
Brittle

Solubility

hot salt water
-

Durability

-
-

Specific Gravity

1.98-2.252.60-2.65
1 7.18
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Fracture

Conchoidal
Uneven, Conchoidal

Cleavage

None
Perfect on {001}, very good on {010}, imperfect on {110}

Mohs Hardness

5-6.56-6.5
2 10
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Chemical Composition

SiO2 · nH2O
NaAlSi 3O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Opal and Albite Chemical Formula

While comparing Opal and Albite 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 Albite chemical formula.

  • Chemical formula of Opal- SiO2 · nH2O
  • Chemical formula of Albite- NaAlSi 3O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Opal and Albite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Albite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Albite Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.60-2.65 whereas that of Albite is 2.60-2.65.