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Opal
Opal

Anatase
Anatase



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Opal
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Anatase

Opal and Anatase Physical Properties

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Physical Properties

Tenacity

BrittleWalter Schumann
Brittle

Solubility

hot salt water
-

Durability

-
-

Specific Gravity

1.98-2.253.82-3.97
1 7.18
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Fracture

Conchoidal
Subconchoidal, Conchoidal

Cleavage

None
Perfect on [001] and [011]

Mohs Hardness

5-6.55.5-6
2 10
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Chemical Composition

SiO2 · nH2O
TiO 2Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Opal and Anatase Chemical Formula

While comparing Opal and Anatase 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 Anatase chemical formula.

  • Chemical formula of Opal- SiO2 · nH2O
  • Chemical formula of Anatase- TiO 2Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Opal and Anatase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Anatase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Anatase Optical Properties during the identification of gemstone. Specific gravity of Opal is 3.82-3.97 whereas that of Anatase is 3.82-3.97.