Precious Opal and Aragonite Physical Properties

Precious Opal

Aragonite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Dilute acid

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.252.93-2.96

1 7.18

1.5 Fracture

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

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

Not Available

Distinct on {010}, imperfect {110} and {011}

1.7 Mohs Hardness

5-6.53.5-4

2 10

1.8 Chemical Composition

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

CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Precious Opal and Aragonite Chemical Formula

While comparing Precious Opal and Aragonite 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 Aragonite chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

Precious Opal Vs Sapphire

Precious Opal Vs Sard

Precious Opal Vs Sardonyx

Precious Opal and Aragonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Precious Opal and Aragonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Aragonite Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 2.93-2.96 whereas that of Aragonite is 2.93-2.96.