MFR BACKORDER 070615 D/Earth diatomaceous earth (12 oz) D/Earth is a low cost non-toxic safe mineral made of crushed fossils. Pure Diatomaceous Earth can be used during the parasite season both internally and externally to improve health appearance and well-being of animals. Diatomaceous Earth is a product that can be used as a nutritional supplement for a wide variety of conditions. Contains the highest concentration of pure raw Diatomaceous Earth available.