I am asking because I am at the end of Silksong and I am missing a mask shard, a spool fragment, and a memory locket. 1 of each.

I went and looked up where they all are, but I have no clue which ones I missed. I got all the act 3 masks and spools.

I have a feeling that I will have to go and check each of the spots to find the missing pieces, but I wanted to know if you guys knew the last piece that you found and where. Maybe I missed the same piece.