hoosiertransfer-mod-saigevers/desktopRuntime/resources/assets/minecraft/blockstates/purpur_slab.json

{
    "variants": {
        "half=bottom,variant=default": { "model": "half_slab_purpur" },
        "half=top,variant=default": { "model": "upper_slab_purpur" }
    }
}