Opals Some Interesting Facts

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Across
  1. 1. Rare type of opal that looks clear and liquid-like?
  2. 4. Second word of that same town, famous for underground homes?
  3. 6. Most common opal colour?
  4. 8. Opal is the birthstone for which month?
  5. 10. First word of another iconic opal mining town?
  6. 11. Which African country is now famous for opal discoveries?
  7. 12. Famous Australian opal mining town (first word)?
  8. 13. Term for an opal’s shifting colour flashes?
  9. 14. Ancient Romans called opal the most ____ gemstone.
  10. 15. Second word in the famous Australian opal town's name?
Down
  1. 2. Country most opals are found?
  2. 3. Many opals form in what type of rock layers?
  3. 5. Opal known for its bright orange and red hues?
  4. 7. Type of opal found inside ironstone rock?
  5. 9. Most valuable coloured opal?