Wikipedia Diatomaceous Earth

201992diatomaceous earth is a natural soft rock that crumbles into a fine palecolored powder of small particle size, and is formed by siliconbased skeletons of diatoms settling as sedimentne form, amorphous, is a known cancer hazard, and is commonly used for filtration alternatively, foodgrade diatomite is used in livestock feeds to control intestinal parasites and, as in foods, to prevent.