Ulmus Americana. Elm wood typically has a straight, interlocked or irregular grain that produces a unique and attractive pattern. The color of elm can vary from light brown to dark brown with a reddish or grayish tinge. Elm wood is moderately dense, with a density of around 560 kg/m3, making it sturdy and durable. Invest in the beauty and durability of natural wood with our exquisite slab supply.