And from that cloud showered these hot, pelting pebbles of pumice stone.
They have all been at work like her, spouting ashes and pumice and rocks and lava.
You know what this is in the case of a sponge, or pumice stone.
The world's principal source for pumice is the Lipari Islands, Italy.
Pumice stone might do it, but it would take your skin off, too.
Here, Oliver, ...