Completed museum and didn’t get stardrop

[depressed lasagna]

I completed the museum, and didn’t receive the star drop or the “complete collection” achievement on the farm. The last thing I donated was the prehistoric scapula. I received the skull furniture piece but not the stardrop. I checked and I have donated everything. I’m trying to get the perfection rating to 100, and I’ve poured 80+ hours onto this farm and I will be devastated if I have to start over just because of this lol. Help...?

[lizardmang]

The most likely cause is that you're missing something. Note that the Collections tab is not a reliable way to check museum donations, as minerals and artifacts only need to be picked up - not donated - to be added to Collections. This is by far the most common cause for reported museum issues.

A simple way to check your museum donations is to count empty slots at the museum; there should be 7 empty slots if every item has been donated. If you find that there are more than 7 empty slots and need to figure out what hasn't been donated, full artifact and mineral lists can be found here:
https://stardewvalleywiki.com/Minerals
https://stardewvalleywiki.com/Artifacts

Let me know if this isn't the case, and I'll help you look for a solution.

[depressed lasagna]

Oops I’ve got 8. I could’ve sworn I had everything donated. Thank you so much