NaturesAura/src/main/resources/assets/naturesaura/blockstates/nature_altar.json

{
    "forge_marker": 1,
    "defaults": {
        "model": "naturesaura:block/nature_altar",
        "textures": {
            "texture": "naturesaura:blocks/nature_altar",
            "top": "naturesaura:blocks/nature_altar_top",
            "particle": "#top"
        },
        "transform": "forge:default-block"
    },
    "variants": {
        "": [{}]
    }
}