White pumice is among the lightest and mostly uncovered varieties. It varieties from very siliceous lava and is commonly used in the production of lightweight concrete. Porosity: Pumice is highly porous, with as much as 90% of its quantity consisting of empty spaces, which makes it a great substance for https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/