Most pumice erupts from magmas which can be remarkably billed with gasoline and have a rhyolitic composition. Not often, pumice can erupt from gasoline-charged magmas of basaltic or andesitic composition. You can find a pumice stone at your neighborhood pharmacy, Section store, as well as the private treatment segment at https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/