Rock Puzzle

1234567891011121314151617181920
Across
  1. 3. how a rock is made
  2. 5. mirror
  3. 7. not translucent
  4. 9. cutlery
  5. 11. pointy
  6. 13. opposite of rough
  7. 14. opposite of crystals
  8. 15. pretty
  9. 17. help you build
  10. 19. kill
Down
  1. 1. dark non colour
  2. 2. layers
  3. 4. lava
  4. 6. made from a volcano
  5. 8. outside a volcano
  6. 10. not thick
  7. 12. all around the earth
  8. 16. Shrek
  9. 18. magma
  10. 20. black rock