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Opal-AN

Formula:
SiO
 
2
·nH
 
2
O
A variety of Opal

This material should be properly labelled as Opal-AN

An often-colourless variety of Opal found as globular concretions. It is an amorphous silica-glass containing water. It is often refered to by the common name 'Hyalite'.

This form of opal occurs in volcanic and pegmatite environments where the silica deposits at elevated temperatures. The subscript "N" is to imply its structure is network-like similar to silica glass rather than composed of separate gel spheres; however, it still contains significant water.

Classification of Opal-AN

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Occurrences of Opal-AN

Geological Setting:Volcanic vugs, pegmatite vugs.

Chemical Properties of Opal-AN

Formula:
SiO
 
2
·nH
 
2
O
Essential elements:
All elements listed in formula:H, O, Si

Other Names for Opal-AN

Synonyms:
HyalineHyaliteJaliteMüller's Glass
German names:
GummisteinHyalitJalit
Spanish names:
HyalitaJalita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Opal-AN

Search Engines:
  • Look for Opal-AN on Google
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  • Mineral Dealers:
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  • Wendel Minerals - Auktion & Shop
  • Fine Minerals from Dan Weinrich Minerals
  • Find Opal-AN on www.crystalclassics.co.uk
  • Search for Opal-AN at Thames Valley Minerals
  • Search for Opal-AN on minvision.com
  • The Arkenstone - Fine Minerals
  • Fabre Minerals - search for Opal-AN specimens
  • e-Rocks - Mineral Auctions and Sales
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Buy fine minerals and gemstones from Pala International
  • Buy from David K Joyce minerals
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    Localities for Opal-AN

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