Common Opal and Benitoite Physical Properties

Common Opal

Benitoite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Insoluble: HCl

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.503.61-3.68

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001)

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

1.6 Cleavage

Not Available

[10 1 1] poor

1.7 Mohs Hardness

5.5-6.56-6.5

2 10

1.8 Chemical Composition

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

BaTiSi 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Common Opal and Benitoite Chemical Formula

While comparing Common Opal and Benitoite 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 Common Opal and Benitoite chemical formula.

Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Chemical formula of Benitoite- BaTiSi 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

Common Opal Vs Diamond

Common Opal Vs Dumortierite

Common Opal Vs Dravite

Common Opal and Benitoite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Common Opal and Benitoite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Common Opal and Benitoite Optical Properties during the identification of gemstone. Specific gravity of Common Opal is 3.61-3.68 whereas that of Benitoite is 3.61-3.68.