src/main/resources/assets/aether_legacy/recipes/zanite_ring.json

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    " Z ",
    "Z Z",
    " Z "
  ],
  "key": {
    "Z": {
      "item": "aether_legacy:zanite_gemstone"
    }
  },
  "result": {
    "item": "aether_legacy:zanite_ring"
  }
}