The phrase can be used synonymously with "volcanic ash." It is actually mined from volcanic ash deposits, or it may be produced by crushing rock pumice. Rub the abrasive facet on the pumice stone about the skin in a circular movement with light-weight force. Therapeutic massage your skin for 2 https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/