Minecraft wiki entry for Things_not_to_do, associated text: Do not carry valuable items in the Nether, unless the player has set up a secure Nether base. A diamond, netherite, or Efficiency-enchanted pickaxe can be more trouble than it is worth, as it instantly mines netherrack. The player can break several blocks with a single click. However, with netherite armor and tools, you may have a little breathing space if this kills you, as they do not burn in lava.