[thirty] Pumice in powdered sort was an component in toothpastes in historic Rome.[31] Nail treatment was very important in ancient China; nails ended up stored groomed with pumice stones, and pumice stones had been also utilised to remove calluses. Porosity: Pumice is very porous, with around ninety% of its volume https://yoursocialpeople.com/story4803069/the-pumice-stone-suppliers-diaries