The duration of pumice stones may vary depending on their composition, usage, artificiality, etc. On average, pumice rocks can last for up to two to four years, with proper washes in between uses. However, for sanitary purposes it is advisable to get a new pumice stone every one to three months, as they pick up bacteria from the skin and can multiply.
Shawnda Dorantes MSN, APRN, FNP-C, a California-based beauty nurse practitioner says, “Remember to wash your pumice stone with antibacterial soap after each and every use. This step is absolutely vital! You should also get a new one every few weeks or boil your pumice stone for at least five minutes every few weeks to ensure more bacteria doesn’t grow and lead to a skin infection.”