Genuine copper. The grid background is a 1/2" grid.
The drilled holes in the pendant are about 1 1/2" apart. I use this piece in my finished jewelry line and have gotten used to bridging that distance pretty quickly. My very favorite string wire is "Soft Flex". Run your figures over your string wire to get the straightest line that you can get and you'll be able to bridge that gap without issue. If the stinging wire has a slight curve to it...well, it's doable but will take a little longer.
Original Artwork by Patricia Healey ~ Each gorgeous genuine copper bead and pendant is handmade from sheet metal. First we cut the shapes out, then put form to metal using the technique of “Repousse”, (beating the crap out of the metal from the reverse side giving it form). We use a bronze solder which you can sometimes see as bits of gold peeking through the solder seams. To get the rich colors we use our top secret patination formula and then fire it up with a torch. Finally, the color is sealed in with a metal lacquer.