Most pumice erupts from magmas that happen to be remarkably billed with gasoline and have a rhyolitic composition. Not often, pumice can erupt from gasoline-billed magmas of basaltic or andesitic composition. This rush of gas with the vent shreds the magma and blows it out to be a molten froth. https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/