... &various colors 3.Fast delivery time Grade A Black Pebble StoneSpecification Product Polished Black Pebble Stone (Grade A) Color mixed, white, black, green, ... 20-30mm, 30-50mm, 60-90mm, 100-150mm, etc. Finished Natural, polished, tumbled. Usage driveway, home decorations, garden, landscaping, decoration ... on slabs, tiles, countertops, sinks, paving stone, curbstone etc.. Grade A Black Pebble Stone