The phrase can be employed synonymously with "volcanic ash." It's mined from volcanic ash deposits, or it can be made by crushing rock pumice. Key highlights Porous Texture - Our pure pumice stone for feet challenging skin is usually a porous rock that has a rough, textured area. This texture https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/