I would think that scrap gold would have a variety of gold percentages in the various pieces that make it up. The final result, if all melted together would also be an unusual percentage. Given that and the fact that gold bars are usually 99.9%, they would either have to refine it further (mostly to remove copper) or trade it to someone who does refine the metal for some that was already refined.
Alternatively, it could be segregated as to purity, then they could keep all of the 10k, 14k, 18k, and 24k in separate batches for melting and then reuse as jewelry of that grade of gold.
Alternatively, it could be segregated as to purity, then they could keep all of the 10k, 14k, 18k, and 24k in separate batches for melting and then reuse as jewelry of that grade of gold.


















