The material cools so swiftly that atoms from the melt are not able to set up themselves into a crystalline construction. So, pumice is really an amorphous volcanic glass often known as a "mineraloid." ① Purely natural VOLCANIC LAVA: This Pumice Stone is made out of pure volcanic lava, rendering https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/