I purchased these earrings around 1985 at Bonham's Auction House in Hollywood. Back then they had great estate auctions. I'm pretty sure these came out of the Debbie Reynolds estate. I have no documentation. They are not marked that I can see, but I feel confident they are 14k. the treaded posts verify their age. Chinese reproductions don't have this. I do believe the diamonds are authentic. I paid a good amount at the auction They are 1/2" across. One post has a little dead spot, no thread, but catches again as you proceed to tighten