Rarest of things

123456789101112131415
Across
  1. 4. falling ocean
  2. 6. have horns in their heads
  3. 12. civilization
  4. 13. colorful
  5. 14. Strongest metal
  6. 15. antenna
Down
  1. 1. good luck
  2. 2. ooo Shiny
  3. 3. really old
  4. 5. lives real deep
  5. 7. glowing jewelry
  6. 8. ancient
  7. 9. mythical
  8. 10. you're not from around here are you
  9. 11. buried