I have been saving these and harvesting the innards for a while. They appear to be gold plated. I have not yet attempted to refine them. Collecting them is easy, as you can pull them off easily with your fingers. Once I have a large amount, I crack them open (top to bottom) with diagonal pliers or wire cutters. The two plastic halves slide away, leaving the metal jumper. I defer to others when it comes to refining, but I think they are easy to collect and remove the plastic 'shell' from. It is an easy thing to do while watching TV. If you are processing a lot of computers, they add up.
-junkelly