What is pumice?

Pumice is a type of rock that feels light and bumpy, like a sponge.

Imagine you're blowing up a balloon really fast, so fast that it can't stretch out fully before the air stops moving. That’s what happens inside a volcano when it erupts: hot gas and lava shoot out, trapping lots of air bubbles inside. When this pumice cools down quickly, those tiny air pockets stay trapped, making the rock feel super light.

If you touch pumice, it might remind you of a rough, dried-out sponge or even the texture of a crumbly cookie. You can hold it in your hand and easily lift it, sometimes, you can even float it on water!

Because it’s so light, pumice is used in things like scrubbers for skin, or even as a special material in buildings. It's not magic, just nature doing its thing with air and lava!