ploof-pack/faithless/assets/minecraft/models/block/polished_andesite_slab.json

{
    "parent": "block/slab",
    "textures": {
        "bottom": "block/polished_andesite",
        "top": "block/polished_andesite",
        "side": "block/polished_andesite_slab_side"
    }
}