It’s relatively interesting, specially when you think about it’s non-porous cousin, obsidian, has also discovered in depth use by humans and it has an extremely comparable chemical framework. Staying non-poisonous and inert suggests it doesn’t dissolve or change the taste of whatever liquid it’s filtering. On the other hand, sand https://freebookmarkpost.com/story18495879/the-5-second-trick-for-pumice-stone