Talk:Crafting/@comment-2601:8C:800:FEE0:BC8B:CF6C:356F:3D94-20171022192737/@comment-32545832-20171023165227

You need to do the blacksmith's quest, and he will give you his pickaxe upon completion (Blacksmith's Pickaxe). When you mine boulders with this pickaxe, you can rarely find obsidian ore.