Pumice is a volcanic rock that is usually light enough to float in water. Our ground pumice is an ingredient you can add to many different products as an excellent exfoliant and to rejuvenate skin without causing irritation. Pumice powder is lightweight and has a neutral pH, making it an ideal choice for many skin care and beauty products. Ground pumice helps to remove calluses, dead skin cells, and dry skin from elbows, feet, hands, knees, and any other hard to reach areas.