Not having a square punch was not a deterrent for me. I simply took a small sharpened chisel and after marking the square on the copper, I placed the metal on a wooden block and pounded out the square. I used the natural indentation from the chisel to pull and smooth the interior edges of the square toward the back. Two sterling eyelets stabilize the top piece and then both pieces of copper were connected with tabs cut from the back piece and pounded around the edge of the top piece. The shiny silver panel is melted heavy-duty aluminum foil, an inexpensive and yet attractive alternative to sterling.
The textures were done with a texture hammer, and the 20 gauge wire across the top was shaped into a curve using a specialized pair of pliers while the tips were torch fired to bring out the red balls on the end. 26 gauge silver wire was wrapped around the copper wire to bring down the silver color into the piece from the silver chain. I used a tiny bronze bee from the cross-stitch stash and buried it in non-yellowing crazy glue.
All this might seem pretty easy, but this piece took me over a day to complete. And worth every minute.