If you’re looking to craft Adamantine Armor or weapons in Baldur’s Gate 3, you’ll need some Mithral Ore. However, it’s an exceptionally rare resource, and tracking it down can be a challenged because ohof limited you are in finding it.
Given how limited Mithral Ore is, you want to be careful about what items you make. You can only use it when crafting at the Adamantine Forge, which you can find in the Underdark before you reach Act 2. Thankfully, in this last section of Act 1, this is where you can find all remaining deposits of Mithral Ore. You want to track them down before you leave this area, where you won’t be able to find anymore or use the Adamantine Forge. Here’s what you need to know about where to get all Mithral Ore in BG3.