Precious Opal and Peridot Physical Properties

Precious Opal

Peridot

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.251.54-1.55

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references

Conchoidal

1.6 Cleavage

Not Available

Poor

1.7 Mohs Hardness

5-6.56.5-7

2 10

1.8 Chemical Composition

SiO 2 · nH 2OGemdat.org , Management Team (2012)

(Mg,Fe)₂SiO₄

Precious Opal and Peridot Chemical Formula

While comparing Precious Opal and Peridot 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 Peridot chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Peridot- (Mg,Fe)₂SiO₄

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Precious Opal and Peridot Specific Gravity

Another important criteria for qualitative analysis of gemstones is Precious Opal and Peridot Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Peridot Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 1.54-1.55 whereas that of Peridot is 1.54-1.55.