#89 stone is a hard, durable course aggregate material. It is generally processed from gravels, granites, limestone, dolomite, and other naturally occurring materials. Typical uses for #89 stone include use in ready-mix concrete, retaining walls, driveways, pipe bedding, and even as a top dressing for driveways or gravel roads. Available at 1 Stop Landscape Supply, #89 stone is sold 3/8” in size.