I'm sure each of us came across an Enriched Notum Nugget, while we were really looking for other kinds. The good news is that it can still be useful by converting it into a Notum Fragment.
All we need for this is a Sledgehammer. It doesn't matter what kind it is as long as it isn't Paper Hammer. It doesn't matter if we can't equip it, it's used exactly the same as any other tradeskill tool. But we need to be powerful enough.