[thirty] Pumice in powdered kind was an ingredient in toothpastes in ancient Rome.[31] Nail treatment was crucial in ancient China; nails were being kept groomed with pumice stones, and pumice stones ended up also employed to remove calluses. Geologists detect possible pumice deposits by learning volcanic activity and inspecting area https://bookmarkja.com/story21744166/not-known-facts-about-pumice-stone