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Opal
Opal

Amethyst
Amethyst



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Opal
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Amethyst

Opal and Amethyst 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
 
-
insoluble in common solvents
-
2.65
Conchoidal, ConchoidalWalter Schumann
Indiscernible
7
SiO2

Opal and Amethyst Chemical Formula

While comparing Opal and Amethyst 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 Amethyst chemical formula.

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Opal and Amethyst Specific Gravity

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