{
    "type": "tfc:cluster_vein",
    "config": {
        "rarity": 20,
        "density": 0.4,
        "min_y": -20,
        "max_y": 60,
        "size": 30,
        "random_name": "graphite",
        "blocks": [
            {
                "replace": [
                    "tfc:rock/raw/gneiss"
                ],
                "with": [
                    {
                        "block": "tfc:ore/graphite/gneiss"
                    }
                ]
            },
            {
                "replace": [
                    "tfc:rock/raw/marble"
                ],
                "with": [
                    {
                        "block": "tfc:ore/graphite/marble"
                    }
                ]
            },
            {
                "replace": [
                    "tfc:rock/raw/quartzite"
                ],
                "with": [
                    {
                        "block": "tfc:ore/graphite/quartzite"
                    }
                ]
            },
            {
                "replace": [
                    "tfc:rock/raw/schist"
                ],
                "with": [
                    {
                        "block": "tfc:ore/graphite/schist"
                    }
                ]
            }
        ]
    }
}