soil Soil Diatomaceous earth Karuishi (lightweight pumice stone) 6.7cm x 4.7cm Retail price: ¥2,750 A daily-use mud pumice stone that moisturizes with mud ingredients while also providing keratin care. It is characterized by a finer texture than ordinary pumice stones. By scrubbing, you can also remove odors from your hands after cooking. soil, a product made using diatomaceous earth, is made in Japan. It offers a range of items that take advantage of the properties of "soil," a material with excellent moisture-regulating and water-absorbing properties.