{
    "format_version": "1.21.110",
    "minecraft:recipe_furnace": {
        "description": {
            "identifier": "minecraft:furnace_copper_nautilus_armor"
        },
        "unlock": [
            {
                "item": "minecraft:copper_nautilus_armor"
            }
        ],
        "tags": [ "furnace", "blast_furnace" ],
        "input": "minecraft:copper_nautilus_armor",
        "output": "minecraft:copper_nugget"
    }
}