I frequently melt down old family gold and make it into new pieces.
After removing any areas of solder, I melt down the gold and cast it
into an ingot using Delft clay for the mould. Then I forge it out, so
I don’t get problems with porosity, then form into sheet or wire with
rolling mills or drawbench. Then I make the new pieces from the sheet
As I am in the UK and have to have all my work hallmarked, I usually
get the gold ingot xrf tested at the Assay Office so I know what
carat it can be marked as.
You could make Delft clay moulds of the rings you want to make, and
pour your gold straight in.
You need to have enough gold for a sprue.
Hope this is