Precious Opal and Adamite Physical Properties

Precious Opal

Adamite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.254.32-4.48

1 7.18

1.5 Fracture

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

Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Not Available

{101}, good; {010}, poor

1.7 Mohs Hardness

5-6.53.5

2 10

1.8 Chemical Composition

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

Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)

Precious Opal and Adamite Chemical Formula

While comparing Precious Opal and Adamite 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 Adamite chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Adamite- Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)

Compare Blue Gemstones

Precious Opal Vs Sardonyx

Precious Opal Vs Sapphire

Precious Opal Vs Sard

Precious Opal and Adamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Precious Opal and Adamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Adamite Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 4.32-4.48 whereas that of Adamite is 4.32-4.48.