The material cools so speedily that atoms in the melt are unable to set up them selves right into a crystalline construction. As a result, pumice is definitely an amorphous volcanic glass called a "mineraloid." Exactly what are foot blisters and what triggers them? Understand the types of foot blisters, https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/