The thing is, the pawnbroker will have paid out for that ring, probably quite a lot given the size of the diamonds. There’s a process to go through with the police etc to get something back from a pawnbroker that they’ve bought in supposed good faith. I know this because it happened to me years ago with an item of jewellery. It was returned eventually but was on some kind of hold until proved it was mine/police reports produced, and the PB themselves were looking at a charge of handling stolen goods. I didn’t just walk in there, find, and walk out with my gold. Something doesn’t look right to me.