Sleek and rectangular top is cool concrete, handmade from a proprietary mix of marble, stone and granite powders with natural fibers for added strength in a shop powered without fossil fuels. Adding to the coffee table's refined, industrial aesthetic is the slim steel base, uniquely hand-welded and ground at each corner with a raw-torched millscale finish. The Parsons Concrete Top/ Dark Steel Base 48x28 Small Rectangular Coffee Table is a Crate and Barrel exclusive.