Polished Blackstone

Recipe #557

{
    "type": "minecraft:crafting_shaped",
    "pattern": [
        "SS",
        "SS"
    ],
    "key": {
        "S": {
            "item": "minecraft:blackstone"
        }
    },
    "result": {
        "item": "minecraft:polished_blackstone",
        "count": 4
    }
}