Willemite and Precious Opal Physical Properties

Willemite

Precious 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

3.89-4.181.98-2.25

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven

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

1.6 Cleavage

{0001}, {11 2 0} imperfect

Not Available

1.7 Mohs Hardness

5.55-6.5

2 10

1.8 Chemical Composition

Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Willemite and Precious Opal Chemical Formula

While comparing Willemite and Precious 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 Willemite and Precious Opal chemical formula.

Chemical formula of Willemite- Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)

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Willemite and Precious Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Willemite and Precious Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Willemite and Precious Opal Optical Properties during the identification of gemstone. Specific gravity of Willemite is 1.98-2.25 whereas that of Precious Opal is 1.98-2.25.