The material cools so speedily that atoms during the soften are not able to prepare on their own into a crystalline composition. Hence, pumice is undoubtedly an amorphous volcanic glass often known as a "mineraloid." Scrub your pumice stone following Every single use. Useless pores and skin will Establish up https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/