I've got the Ivories. I just havn't put them in yet.
I always put my ivories in with a little dab of hot glue. That way if they want to pull them later to make jewelry with them all they have to do is use a hair dryer to soften the glue and pull them out. The Hot glue will just peel right off the ivory.
I also never whiten the ivories for the same reason.