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Opal
Opal

Fluorite
Fluorite



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Opal
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Fluorite

Opal and Fluorite Physical Properties

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Physical Properties

Tenacity

BrittleWalter Schumann
Brittle

Solubility

hot salt water
slightly water soluble and in hot hydrochloric acid

Durability

-
-

Specific Gravity

1.98-2.253.00-3.25
1 7.18
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Fracture

Conchoidal
Subconchoidal, Uneven, ConchoidalWalter Schumann

Cleavage

None
Octahedral, perfect on {111}, parting on {011}

Mohs Hardness

5-6.54
2 10
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Chemical Composition

SiO2 · nH2O
CaF2

Opal and Fluorite Chemical Formula

While comparing Opal and Fluorite 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 Fluorite chemical formula.

  • Chemical formula of Opal- SiO2 · nH2O
  • Chemical formula of Fluorite- CaF2

Opal and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Opal is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.