ailuropack/waystones-recipes/data/waystones/recipes/blackstone_waystone.json

{
  "type": "minecraft:crafting_shaped",
  "key": {
    "O": {
      "item": "minecraft:obsidian"
    },
    "S": {
      "item": "minecraft:blackstone"
    },
    "W": {
      "item": "minecraft:nether_star"
    }
  },
  "pattern": [
    " S ",
    "SWS",
    "OOO"
  ],
  "result": {
    "count": 1,
    "item": "waystones:blackstone_waystone"
  }
}