Mark the desired path of the edging by inserting a series of stakes into the ground and tying string between them.
Measure the height of the tallest stoneware piece. Dig a narrow trench along the string line that is 2 1/2 inches deeper than the tallest stoneware height, removing the stakes along the way.
Pack the ground at the bed of the trench by tamping it firmly with the butt-end of a 2-inch by 4-inch board.
Fill the bed with 4 inches of gravel to supply drainage.
Begin arranging stoneware pieces straight up and down, into the trench, so they stick up 1 1/2 inches above the surface of the ground. Add extra gravel beneath pieces when more height is needed. Place any sharp, dangerous edges of broken stoneware pieces face down, into the ground.
Pack gravel into the gaps around the stoneware pieces to secure them in place. Leave 2 to 3 inches of space between the top of the added gravel and the surface of the ground.
Intermingle the stoneware pieces with large rocks or stones for added stability and aesthetic variation.
Inspect the edging for any wobbly pieces or chasms. Backfill loose pieces and fill chasms with gravel, sand or dirt.
Fill the remaining gap between the gravel and the surface of the ground with the previously excavated dirt. Pack the dirt firmly on top of the layer of gravel.