You can make a Cobblestone Generator machine to infinitely generate cobblestone for your sake. On another hand, Blackstone can be found in specific biomes in the Nether dimension.

Never run out of stone again! 🪨💡 In this survival-friendly tutorial, you’ll learn how to build a stone farm in Minecraft — also known as an automatic cobblestone generator. Using ...

Never run out of building blocks again! 🪨 In this Minecraft tutorial, I’ll show you how to build a Rock Farm — an automatic cobblestone, stone, and basalt generator using lava + water ...