The phrase can be employed synonymously with "volcanic ash." It is actually mined from volcanic ash deposits, or it may be produced by crushing rock pumice. Rub the pumice stone in round motions more than the calloused region. Use Mild, round motions to slough absent the useless pores and skin https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/