Yeah i found one while minning in the tc cave after 30 mins i think :D
08/04/2008 18:53Relaxation#17
Ive got more than 4-500 gems from monster drop. never got tortoise even once. dragon gem and rainbow gem are a bit rare too
08/05/2008 03:05silverstreak#18
ok ive never had a NTG drop from any mob, but i noticed everyone has overlooked this information. This is from CO site - [Only registered and activated users can see links. Click Here To Register...] hope this helps you out!