These realistic stones are handmade of high-density casting plaster. They are cast in solid colors so that the edges show their natural color when trimmed. To cut them, simply use an X Acto knife to score the surface and snap at the score. Each bag covers approximately 100 square inches. The largest stone measures 1" x 1/2" and they are 1/12 scale.
Instructions are included with the stones. It is recommended to glue stones in place and to seal them with non yellowing sealer. A mortar mix can then be applied between the stones.