{
   "format_version":"1.13.0",
   "minecraft:ore_feature":{
      "description":{
         "identifier":"hearts:heart_shard_ore_feature"
      },
      "count":8,
      "replace_rules":[
         {
            "places_block":{
               "name":"hearts:heart_shard_ore",
               "states":{
                  
               }
            },
            "may_replace":[
               {
                  "name":"minecraft:stone",
                  "states":{
                     
                  }
               }
            ]
         }
      ]
   }
}