Sugilite and Common Opal Physical Properties

Sugilite

Common Opal

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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

2.69-2.791.98-2.50

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

Conchoidal, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

Poor on {0001}

Not Available

1.7 Mohs Hardness

5.5-6.55.5-6.5

2 10

1.8 Chemical Composition

KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Sugilite and Common Opal Chemical Formula

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

Chemical formula of Sugilite- KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

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Sugilite and Common Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sugilite and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sugilite and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Sugilite is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.