{
  "type": "minecraft:block_column",
  "config": {
    "direction": "down",
    "allowed_placement": {
      "type": "minecraft:matching_blocks",
      "offset": [
        0,
        1,
        0
      ],
      "blocks": [
        "minecraft:air",
        "minecraft:lava"
      ]
    },
    "prioritize_tip": true,
    "layers": [
      {
        "height": 128,
        "provider": {
          "type": "minecraft:weighted_state_provider",
          "entries": [
            {
              "weight": 99,
              "data": {
                "Name": "minecraft:blackstone"
              }
            },
            {
              "weight": 1,
              "data": {
                "Name": "minecraft:gilded_blackstone"
              }
            }
          ]
        }
      }
    ]
  }
}