Cobble rock is generally defined by its round shape. Rock quarries call non-crushed rock “cobble”. Not all cobble rock is perfectly round. Many cobble varieties come with fractured edges, but are still much smoother than a crushed rock edge. Because of their smooth edges, small cobble rocks tend to move easily when stepped on our driven over. They are ideal for beautifying your landscape as a dry river bed, planter area ground cover, and other decorative uses. Click a photo below for more details: