Common Opal and Rutile Physical Properties

Common Opal

Rutile

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Insoluble in acids

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.504.20-4.30

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001)

Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Not Available

{110} good, 100 moderate, parting on {092} and {011}

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)

TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Common Opal and Rutile Chemical Formula

While comparing Common Opal and Rutile 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 Rutile chemical formula.

Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Chemical formula of Rutile- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

Common Opal Vs Dravite

Common Opal Vs Dumortierite

Common Opal Vs Diamond

Common Opal and Rutile Specific Gravity

Another important criteria for qualitative analysis of gemstones is Common Opal and Rutile Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Common Opal and Rutile Optical Properties during the identification of gemstone. Specific gravity of Common Opal is 4.20-4.30 whereas that of Rutile is 4.20-4.30.