The term may be used synonymously with "volcanic ash." It is actually mined from volcanic ash deposits, or it could be made by crushing rock pumice. This hurry of gasoline through the vent shreds the magma and blows it out to be a molten froth. The froth fast solidifies mainly https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/