Related Clues:
- Crown jewel
- One of these can be found reading counterclockwise somewhere in each concentric ring
- Earth is one
- Mars or Jupiter
- Mercury, e.g.
- Mercury or Mars
- Kent's paper
- Rock around a star
- Emerald or ruby
- Krypton or Ork
- Krypton, in science fiction
- Kent's newspaper
- Solar system spheroid
- Opal or topaz
- Mars or Venus