I bought some diamonds off the exchange this morning, but found they were a sale meant for someone else's friend.

I want to refund the diamonds to the seller so they can give the diamonds to their friend, but the price they were sold at on the exchange was really low and I'm worried that someone else would snatch the diamonds up before the seller could. Is there a way to send the diamonds to the person I bought them from without risking someone else taking them from me?

I would really like to do the right thing, but I don't know how. :(

(sorry if this is the wrong board, I didn't know where else to ask.)

Have the other person create an offer in the currency exchange selling the appriopriately low amount of gold for diamonds. Then you accept that offer.