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Opal
Opal

Emerald
Emerald



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Opal
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Emerald

Opal and Emerald Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
BrittleWalter Schumann
hot salt water
-
1.98-2.25
Conchoidal
None
5-6.5
SiO2 · nH2O
 
-
-
Hard
2.67-2.78
Uneven, ConchoidalWalter Schumann
Imperfect on the [0001]
7.5-8
Be3Al2SiO6

Opal and Emerald Chemical Formula

While comparing Opal and Emerald 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 Emerald chemical formula.

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Opal and Emerald Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal Vs Emerald during the identification of gemstone. Specific gravity of Opal is whereas that of Emerald is .