[thirty] Pumice in powdered kind was an ingredient in toothpastes in ancient Rome.[31] Nail care was very important in historic China; nails were being kept groomed with pumice stones, and pumice stones were being also used to remove calluses. The biggest volcanic eruptions can eject several cubic kilometers of material. https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/