For blackberries, you will need black sculpey clay and small black seed beads.
Make little round balls of the black clay by rolling it through your fingers.
Pour the beads out onto a plate or into a bowl so they don't spill and make a mess. Taking one of the small round balls, roll it into the beads while pressing down to coat it in beads. Make sure the beads are pressed into the clay, otherwise they will pop out during the baking process.
The finished blackberry should look something like this. It's ok for it to be a little lopsided.
Bake the blackberries on a cookie tray covered in wax paper for 15 minutes at 215 degrees. Remove and let cool an extra amount, since the beads will be quite hot.