minecraft-assets/assets/minecraft/blockstates/suspicious_sand.json

{
  "variants": {
    "dusted=0": {
      "model": "minecraft:block/suspicious_sand_0"
    },
    "dusted=1": {
      "model": "minecraft:block/suspicious_sand_1"
    },
    "dusted=2": {
      "model": "minecraft:block/suspicious_sand_2"
    },
    "dusted=3": {
      "model": "minecraft:block/suspicious_sand_3"
    }
  }
}