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Precious Opal
Precious Opal

Magnesite
Magnesite



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Precious Opal
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Magnesite

Precious Opal and Magnesite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Effervesces in hot HCl

Durability

-
-

Specific Gravity

1.98-2.252.92-3.12
1 7.18
👆🏻

Fracture

Conchoidal
Conchoidal

Cleavage

None
[10 1 1] perfect

Mohs Hardness

5-6.53.5-4.5
2 10
👆🏻

Chemical Composition

SiO 2 · nH 2OGemdat.org , Management Team (2012)
MgCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Precious Opal and Magnesite Chemical Formula

While comparing Precious 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 Precious Opal and Magnesite chemical formula.

  • Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
  • Chemical formula of Magnesite- MgCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Precious Opal and Magnesite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Precious Opal and Magnesite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Magnesite Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 2.92-3.12 whereas that of Magnesite is 2.92-3.12.