Bentonite White (Lumps) is an unprocessed, natural clay mineral in lump form that is characterized by its high plasticity, water absorption, and swelling capacity, especially the sodium bentonite variety. These properties make it useful as a binding agent, a sealant, and in fluid applications like drilling mud. Its color is a natural white, a result of its composition, and it comes in various grades, though specific iron content can influence its color.