So I've seen a few shops and a couple have magma blocks for sale. I find it off because when I go into the nether and mine netherrack, it doesn't let me mine magma blocks? Like it says I can't mine that item? So in a way I have two questions and I need help here. 1. How did people get magma blocks in the first place especially in bulk? 2. Why can't we mine them in the nether?