Precious Opal and Powellite Physical Properties

Precious Opal

Powellite

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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

1.98-2.254.23

1 7.18

1.5 Fracture

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

UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

1.6 Cleavage

Not Available

{111} Distinct

1.7 Mohs Hardness

5-6.53.5-4

2 10

1.8 Chemical Composition

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

CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Precious Opal and Powellite Chemical Formula

While comparing Precious Opal and Powellite 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 Powellite chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Powellite- CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

Precious Opal Vs Sapphire

Precious Opal Vs Sardonyx

Precious Opal Vs Sard

Precious Opal and Powellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Precious Opal and Powellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Powellite Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 4.23 whereas that of Powellite is 4.23.