Nosean and Common Opal Physical Properties

Nosean

Common Opal

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

2.30-2.40

Uneven, Conchoidal

{110} Perfect

-9999

Na 8Al 6Si 6O 24(SO 4) · H 2OAnthony et al , Handbook of Mineralogy (2001)

1.98-2.50

Conchoidal

None

5.5-6.5

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

Nosean and Common Opal Chemical Formula

While comparing Nosean 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 Nosean and Common Opal chemical formula.

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Nosean and Common Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nosean and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nosean Vs Common Opal during the identification of gemstone. Specific gravity of Nosean is whereas that of Common Opal is .