Cobblestone and pebble Nautral cobblestone, river stone, machine-made cobbles, pebbles, pebble stone in many colors and sizes Cobblestone and pebbleNautral cobblestone, river stone, machine-made cobbles, pebbles, pebble stone in many colors and sizes are very popular in Asian, European and American markets.Nice color, high quality, competitive price and best service. 1) Size: Diameter 0.8-1.2cm, ...