Boulder Opal and Willemite Physical Properties

Boulder Opal

Willemite

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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

1.98-2.253.89-4.18

1 7.18

1.5 Fracture

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

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven

1.6 Cleavage

Not Available

{0001}, {11 2 0} imperfect

1.7 Mohs Hardness

5-6.55.5

2 10

1.8 Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

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

Boulder Opal and Willemite Chemical Formula

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

Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Chemical formula of Willemite- Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Boulder Opal and Willemite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boulder Opal and Willemite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boulder Opal and Willemite Optical Properties during the identification of gemstone. Specific gravity of Boulder Opal is 3.89-4.18 whereas that of Willemite is 3.89-4.18.