paper.json

{
  "parent": "minecraft:item/generated",
  "textures": {
    "layer0": "minecraft:item/paper"
  },
  "overrides": [
    {
      "predicate": {
        "custom_model_data": 10
      },
      "model": "flysmp:item/diamond_shard"
    },
    {
      "predicate": {
        "custom_model_data": 20
      },
      "model": "flysmp:item/emerald_shard"
    }
  ]
}