... stone Pebble style:polished,highly polished Color: black Pebble size:5mm-12mm 10-20mm 20-30mm ... We specialize in manufacturing natural pebble stones, cobble stones, polished pebbles,river stones, river rocks,pebble mosaic,pebble ... tiles, mesh pebble flooring tile , multicolored cobble stones, agate stone carvings, garden pebbles, filter materials ... indoor and outdoor flooring. Black Pebble/cobble