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Taaffeite
Taaffeite

Opal
Opal



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Taaffeite
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Opal

Taaffeite and Opal Physical Properties

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Physical Properties

Tenacity

-
BrittleWalter Schumann

Solubility

-
hot salt water

Durability

-
-

Specific Gravity

3.60-3.611.98-2.25
1 7.18
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Fracture

Conchoidal
Conchoidal

Cleavage

Imperfect/fair/absent
None

Mohs Hardness

8-8.55-6.5
2 10
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Chemical Composition

Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references
SiO2 · nH2O

Taaffeite and Opal Chemical Formula

While comparing Taaffeite and Opal 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 Taaffeite and Opal chemical formula.

  • Chemical formula of Taaffeite- Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references
  • Chemical formula of Opal- SiO2 · nH2O

Taaffeite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Taaffeite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Taaffeite and Opal Optical Properties during the identification of gemstone. Specific gravity of Taaffeite is 1.98-2.25 whereas that of Opal is 1.98-2.25.