Place the piece on a soldering surface. Gradually heat the piece around the outside and down the center between the two frames. Concentrate more on the double layers of metal rather than the backing. Heat until the solder flows. Allow to cool naturally. Check to make sure the solder flowed under the inner frame sections of the leaf.
Note: The two saw cuts in the frame did not solder together, even though they were pushed together as tightly as possible before placing on the backing. As the metal "relaxed" when being heated, it went back to the original shape with a slight opening in the saw cuts. This is why the Tropical Leaves earring shapes should have been cut starting at the top.