Dark Prismarine Slab

Recipe #768

{
    "type": "crafting_shaped",
    "pattern": [
        "###"
    ],
    "key": {
        "#": {
            "item": "minecraft:dark_prismarine"
        }
    },
    "result": {
        "item": "minecraft:dark_prismarine_slab",
        "count": 6
    }
}