Cobbles are available in various types of material at MPG Stone. These would be granite, concrete and porphyry. If you wish to have cobbles as flooring in your driveway, you can have them either as individual stones or nicely mesh backed in a defined pattern. Mesh backing allows quicker laying and if glued to a concrete surface ensures solid contact between the concrete and the stone. Furthermore, they can be laid out on a sand base and grouted with gravel, sand and mortar.