Basic effect; The performer shows a clear plastic die or cube. The die is ornamented with colorful rhinestones or gems on each of it's sides. You may allow your spectator to examine the die if you like.
The performer places the die in his hand, then shows a Blank solid black plastic rod  to be blank on both sides. The rod is passed thru the performer's fist and now the rod is glittering with colorful rhinestones! When the performer opens his hand the die now shows the rhinestones to have vanished The die can immediately be passed out for examination! A Great pocket trick!