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Opal
Opal

Scolecite
Scolecite



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Opal
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Scolecite

Opal and Scolecite Physical Properties

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Physical Properties

Tenacity

BrittleWalter Schumann
Brittle

Solubility

hot salt water
Soluble

Durability

-
-

Specific Gravity

1.98-2.252.20-2.23
1 7.18
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Fracture

Conchoidal
Irregular/uneven, Uneven

Cleavage

None
Perfect on {110} and {1 1 0}

Mohs Hardness

5-6.55-5.5
2 10
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Chemical Composition

SiO2 · nH2O
CaAl 2Si 3O 10 · 3H 2OUlrich Henn and Claudio C.

Opal and Scolecite Chemical Formula

While comparing Opal and Scolecite 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 Scolecite chemical formula.

  • Chemical formula of Opal- SiO2 · nH2O
  • Chemical formula of Scolecite- CaAl 2Si 3O 10 · 3H 2OUlrich Henn and Claudio C.

Opal and Scolecite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Scolecite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Scolecite Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.20-2.23 whereas that of Scolecite is 2.20-2.23.