This pendant is made by careful piercing (sawing) silver and copper sheet and then soldering the shapes together so that they then appear to be one sheet of metal.  It takes a lot of filing and sanding to get the surfaces to be completely smooth and free of solder.  This ‘married’ metal has then been framed by putting it on to another piece of silver.  To avoid the solder of the married metal from running again, I used a cold connection and riveted them together.