This porous volcanic rock has astonishing erosive properties. What's more, thanks to its low density, it also floats on water. The moral of the story is: you can occasionally use the pumice whilst washing your hands, but don't use it to go diving.
This porous volcanic rock has astonishing erosive properties. What's more, thanks to its low density, it also floats on water. The moral of the story is: you can occasionally use the pumice whilst washing your hands, but don't use it to go diving.