The fabric cools so rapidly that atoms during the soften are not able to set up on their own right into a crystalline composition. Consequently, pumice is surely an amorphous volcanic glass known as a "mineraloid." Geologists identify prospective pumice deposits by finding out volcanic action and analyzing surface outcrops https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/