{
  "format_version": "1.21.110",
  "minecraft:recipe_furnace": {
    "description": {
      "identifier": "minecraft:furnace_copper_spear"
    },
    "unlock": [
      {
        "item": "minecraft:copper_spear"
      }
    ],
    "tags": [
      "furnace",
      "blast_furnace"
    ],
    "input": "minecraft:copper_spear",
    "output": "minecraft:copper_nugget",
    "priority": 150
  }
}