These are pretty simple, but I love the effect I get when I layer the new CiM opals, Rainforest and Atlantis, with copper green. These are copper green and Rainforest. There is a little reduction of the copper green and it scums up and boils like crazy, worse if I've marvered it, like I have. I still am really digging these. I made them on 1/8" mandrels for stringing on some braided cotton cord. Now the hard part (for me), deciding what to do with them.