Outline a heart shape in heavy-gauge wire. Using a pair of pliers, tie the points together with garden wire.
Place the heart shape over a double layer of chicken wire, and cut out a slightly larger heart with wire cutters. Tie the chicken wire to the wire frame with garden wire, leaving an opening through which to fill it.
Fill the heart with pretty pebbles. (Try large, colored glass pebbles if you want to up the bling factor.)
Close the opening; attach a sturdy chain and hang.