Most pumice erupts from magmas that happen to be remarkably billed with gas and have a rhyolitic composition. Hardly ever, pumice can erupt from fuel-charged magmas of basaltic or andesitic composition. You could find a pumice stone at your local pharmacy, Office retail store, or even the personal care section https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/