The hardest part when making pendants, is to keep the pieces from warping when they dry. I sandwich the pieces between two large pieces of wallboard. Sometimes they still warp. The only cure I have found is to re-wet the pieces and let them soak until they are soft enough to press flat. It's tricky and I lose alot of pieces that have warped.
Here is a picture of pendants in various stages of dryness, and the wallboard. Dried, unfired clay is called greenware, and it is VERY fragile.