Lump charcoal is also made from wood leftovers, including timber scraps, furniture, and even flooring. They’re manufactured through a process called carbonization, where the oxygen in the environment is carefully limited, and by-products like methane, hydrogen, and water are burned away so the result is nearly pure carbon. Lump charcoal is often just a quarter of the weight of the original material, comprised of irregular pieces of coals and tar sediment. Unlike briquettes, there is no binder, which leads to a cleaner flavor.