{
  "blocks": [
    {
      "random": 20,
      "block": "minecraft:polished_blackstone_bricks"
    },
    {
      "random": 20,
      "block": "minecraft:cracked_polished_blackstone_bricks"
    },
    {
      "random": 20,
      "block": "minecraft:polished_blackstone_slab[type=bottom]"
    },
    {
      "random": 20,
      "block": "minecraft:polished_blackstone_stairs[facing=north,half=bottom]"
    },
    {
      "random": 1000,
      "block": "minecraft:polished_blackstone"
    }
  ]
}
