Nexan-s_Custom_Resources/assets/minecraft/models/item/petrified_oak_slab.json

{
  "parent": "minecraft:block/petrified_oak_slab",
  "overrides": [
	{
		"predicate": {
			"custom_model_data": 1
		},
		"model": "custom:item/derpcoin_block"
	}
  ]
}