[30] Pumice in powdered variety was an ingredient in toothpastes in historic Rome.[31] Nail treatment was very important in ancient China; nails have been stored groomed with pumice stones, and pumice stones were being also used to get rid of calluses. Geologists recognize potential pumice deposits by learning volcanic action https://listfav.com/story21015474/not-known-factual-statements-about-pumice-stone-suppliers