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Boulder Opal

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Big Photo

Yowah Nut
Yowah opal field, Paroo Shire, Queensland, Australia
© Peter Kohorst

Show Boulder Opal Photos (29)



A variety of Precious Opal

A variety of Precious Opal found in Queensland, Australia, as cracks or coatings in and around ironstone/sandstone boulders.

Classification of Boulder Opal

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Other Names for Boulder Opal

Synonyms:
Queensland Opal
Other Languages:
Varieties:
Yowah Nut

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.

References for Boulder Opal

Reference List:

- +
Jones, J.B. and E.R. Segnit (1971), The nature of opal. I Nomenclature and constituent phases. Journal of the Geological Society of Australia: 18: 57-68.

Anal. Chem. Acta (1994): 286: 107.

Lapis Extra No. 10, Opal (1996).

Internet Links for Boulder Opal

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    • Localities for Boulder Opal

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • New South Wales
      • Finch Co.
      • Paroo Shire
      • Quilpie Shire
      • Winton Shire
    		Dennis Tryon collection
    Brazil
     
    • Pará
      • São Geraldo do Araguaia
    		Revista Brasileira de Geociências, vol.30
    Canada
     
    • British Columbia
      • Vernon Mining Division
        • Vernon
    		Can.Rockhound v.3, no.1
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