item model json

{
  "parent": "item/generated",
  "textures": {
    "layer0": "minecraft:block/gold_block"
  },
  "overrides": [
    { "predicate": { "custom_model_data": 1}, "model": "minecraft:item/gold_block" },
    { "predicate": { "custom_model_data": 2}, "model": "minecraft:item/gold_ingot" },
    { "predicate": { "custom_model_data": 3}, "model": "minecraft:item/gold_nugget" },
    { "predicate": { "custom_model_data": 4}, "model": "minecraft:item/gold_ore" }
  ]
}