It actually does. But not quicksilver as I thought but something even more obvious
Ender pearl
I solved the problem by editing
1) /minecraft/saves/<worldname>/players/<playername>.dat->ForgeData->PlayerPersisted->TCScanned->TCScannedObjList
2) /minecraft/saves/<worldname>/level.dat->Data->Player->ForgeData->PlayerPersisted->TCScanned->TCScannedObjList
with NBTExplorer.
In both lists I searched for the object ID and deleted the entry. Then I loaded my save, scanned the item and got the research unlocked.
I did the same for Brain in the Jar research (guess what the key was) and I will probably have to do it for a couple more.
If you want to do this legitimately, I have been following @Direwolf20 's
HTML:
<a href="www.youtube.com/user/direwolf20"> YouTube channel</a>
Watching some Twitch streams (like @Soaryn's
HTML:
<a href="www.twitch.tv/Soaryn">Twitch Channel</a>
Only other I can think of is to scan everything mirror-related (essentia stuff, infusion).