I have just about finished it. There's a little light leaking on the corners I have to deal with better and I'm pretty happy with it but still can't get a good picture.
I made the frame out of J channel for hanging vinyl siding and hid rgb battery operated LED lighting inside it with the battery box behind the raised portion of the artwork. It's operated with a remote and changes color.
There are 15 colors and a fade option which keeps changing them slowly. I used small gems throughout: amethyst, (of course!), adventurine, peridot, garnet, red agate and citrine as well as the bismuth crystal and iridescent acrylic paint so all that picks up the different color light. I'm pretty sure Amethyst Cavern 7 will have this frame too, lol.