It’s fairly appealing, specially when you think about it’s non-porous cousin, obsidian, has also discovered comprehensive use by people and it has an extremely equivalent chemical composition. Pumice is fashioned during volcanic eruptions, like all igneous rocks. It commences it’s life as magma deep beneath the floor of your Earth. https://bookmarkgenius.com/story18527337/reptile-substrate-no-further-a-mystery