Diatomaceous earth is a fossilized product of Diatoms, small aquatic creatures. These species’ skeletons are constructed of the mineral silica. Diatomaceous earth is largely used in products for a variety of domestic pests, including bed bug powder, cockroach powder, and flea, tick, and spider powders. Diatomaceous earth is used in non-pesticide products as well. These goods include beverages, pharmaceuticals, paints, and toothpaste.