Pebble 1.Grade B 2.Color: black 3.Size: 10-20mm 4.Finishing: polished Pebble, pebble stone, beach pebbles, river pebble, decorative pebbles, pebble wash, garden pebbles.Description as follow: ProductBlack Natural River Pebble StoneColormixed, white, black, green, red, yellow, pink, etc.Size6-12mm,10-20,12-20mm, 20-30mm, 30-50mm, 60-90mm,100-150mm, etc . FinishedNatural, polished.Usagedriveway, ...