Quote:
Dull of Black Coal
Fiber Filament
Sound like fuel to me. If they are, buy them from your wholesaler or workshop.
You'd have to get one of those "rare" (semi-rare) harvestables called "Sparkling Flower" or "Sparkling Stone" or "Sparkling Fish Scale" or...there are more. Obviously, they all start with Sparkling. Then, get an alchemist to make you a Sparkling Extract.
I think Steel Cluster is a rare...not sure what tier...3 maybe? Well, it'll be whichever tier you're working in.
Just in case you don't know, in order to imbue an item, it has to be pristine. So, you'd make a pristine steel tulwar, then use an imbuing recipe to combine it with the extract.