The phrase can be utilized synonymously with "volcanic ash." It really is mined from volcanic ash deposits, or it could be made by crushing rock pumice. The key with pumice stones is always to only utilize them on strong surfaces like porcelain and ceramic and also to normally keep the https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/