I dropped a saucer the other day and broke it. It really was unrepairable so I decided to make it into jewelry.
I turned it over, covered it with a paper towel and proceeded to bang on it with a hammer. It broke into a bunch of triangular pieces.
Renaissance Foil used to be found in the gold leaf sections of most craft stores, but I guess it's somewhat out of favor now so unless you have some in your stash (or wish to order it online), you may have to use gold leaf (actually composition leaf). It is still stocked at Michael's. Use the same technique as above. In each case, if the foil/leaf does not stick in one area, simply apply more glue.
So here you have 3 for the price of one tutorial. The shard on the left is done with Renaissance Foil, the one in the middle is with gold leaf and the right one is done with a pen. Take your choice.
Now you can glue a pinback on the back, drill a small hole at the top (use a drill bit for ceramic tile) or glue a bale at the top to hang on a chain. Epoxy or E6000 are good choices for adhering the bale and pinback.