BiomesOPlenty/src/main/resources/assets/biomesoplenty/recipes/amethyst_block.json

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    "###",
    "###",
    "###"
  ],
  "key": {
    "#": {
      "type": "forge:ore_dict",
      "ore": "gemAmethyst"
    }
  },
  "result": {
    "item": "biomesoplenty:gem_block",
    "data": 0
  }
}