White pumice is One of the lightest and mostly discovered varieties. It forms from very siliceous lava and is usually Utilized in the manufacture of light-weight concrete. You can find a pumice stone at your neighborhood pharmacy, Section shop, as well as the non-public treatment segment for the grocery store. https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/