Next, create some larger voids. Use a ball stylus, needle tool, or other similar tool to mark all sides of your bead or pendant.
For a realistic look, avoid putting marks in a pattern. Instead, place them radomly, perhaps with a greater concentration of marks in one area and none in another. Make the marks in different shapes and sizes. You want a variety of shapes-- not a series of perfectly round marks.
If you're working with a soft clay, this step may slightly distort your bead or pendant. Not to worry! Carefully nudge the clay back into the desired form. While doing this, you'll notice that some of your larger voids change shape. This isn't a problem, so long as they don't completely close up on themselves. If they do, simply open them back up (or make new pits) with your tool-- carefully, to avoid distorting the overall shape again.