The gold on this pin has a lovely muted quality. It is not marked but tests positive for gold of 14k. It is 1 1/2 inches wide and 1 5/16 inch long including the pearl drop. What is fascinating is the impossibly tiny diamonds that are set into the piece. One that is a little over 1mm and is bezel set and open backed right on top of the pearl. The other diamond is on the left side of the central pearl. Both pearls have very nice nacre and are possibly natural but I have no way of checking this. The weight is 6 grams and condition is excellent. Most likely American in origin.