Across:
3. gem
4. mint
6. chia
8. oak
9. ruki
11. gummiworms
15. kau

Down:
1. hagan
2. tech
5. totem
7. ixi
10. karma
12. usul
13. moon
14. warf

http://www.neopets.com/games/crossword/index.phtml

If you spot any mistakes, please PM a staffer who is online.