Talk:Achievements/@comment-2A00:23C4:350:9700:7C64:F898:224A:BF81-20171125162954/@comment-35956929-20181005050234

I had the same issue as well. When the achievement first came out, obsidian shards were smelted in a furnace. Now that you put them in a millstone, the game does not give you the achievement.