Can gold rust?

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  1. #benign
  2. #environments
  3. #shows
  4. #surfaces
  5. #reflecting
  6. #reactive
  7. #never
  8. #which
  9. #industrial
  10. #darkening
  11. #active
  12. #reacts
  13. #metals
  14. #tarnish
  15. #oxygen
  16. #elements
  17. #corrosion
  18. #means
  19. #natural
  20. #usually