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Boulder Opal
Boulder Opal

Willemite
Willemite



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Boulder Opal
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Willemite

Boulder Opal and Willemite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.98-2.253.89-4.18
Amber
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
Amber
2 10
1.8 Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
Zn 2SiO 4Michael O’Donoghue , 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 O’Donoghue , Gems, Sixth Edition (2006) More from other references

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.