The word may be used synonymously with "volcanic ash." It really is mined from volcanic ash deposits, or it might be made by crushing rock pumice. Pumice is likewise valued in metaphysical circles for its associations with cleaning and renewal, given its volcanic origins and connection to earth and hearth https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/