minecraft-assets/assets/minecraft/blockstates/stone.json

{
  "variants": {
    "": [
      {
        "model": "minecraft:block/stone"
      },
      {
        "model": "minecraft:block/stone_mirrored"
      },
      {
        "model": "minecraft:block/stone",
        "y": 180
      },
      {
        "model": "minecraft:block/stone_mirrored",
        "y": 180
      }
    ]
  }
}