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Opal
Opal

Magnesite
Magnesite



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Opal
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Opal and Magnesite 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
 
Brittle
Effervesces in hot HCl
-
2.92-3.12
Conchoidal
[10 1 1] perfect
3.5-4.5
MgCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Opal and Magnesite Chemical Formula

While comparing Opal and Magnesite 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 Magnesite chemical formula.

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Opal and Magnesite Specific Gravity

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