[30] Pumice in powdered form was an component in toothpastes in historical Rome.[31] Nail treatment was very important in historic China; nails had been kept groomed with pumice stones, and pumice stones have been also used to eliminate calluses. Pumice mining is usually a area Procedure as deposits are sometimes https://businessbookmark.com/story4876804/not-known-facts-about-pumice-stone