Volcanic Pumice Stone

Volcanic pumice stones are light, porous rocks formed during explosive volcanic eruptions when molten lava rapidly depressurizes and cools, trapping gas bubbles inside. This sudden cooling gives pumice its uniquely frothy texture and extremely low density—so low that many pumice stones can float on water. Their abrasive yet lightweight nature makes them useful in everyday life, especially for exfoliating skin and smoothing calluses.