Word.ws English Dictionary

boulder opals

boulder opals is the plural of boulder opal.

Meaning of boulder opal

Noun

boulder opal (countable and uncountable, plural boulder opals)

  1. An opal consisting of concretions and fracture fillings in a dark siliceous ironstone matrix.

Questions about boulder opals

What is boulder opals the plural of?
Boulder opals is the plural of boulder opal.

Words near boulder opals in the dictionary

  1. Boulder County
  2. Boulder Creek
  3. boulder holder
  4. boulder holders
  5. boulder opal
  6. boulder opals
  7. boulderable
  8. bouldered
  9. boulderer
  10. boulderers
  11. bouldering

Source and license

Adapted from Wiktionary: boulder opals (page history and authors); boulder opal (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “boulder opals.” Word.ws, https://word.ws/boulder_opals. Based on Wiktionary, CC BY-SA 4.0.