Particularly the purple/white swirled focal, which I love very much but haven't figured out how to use. (If I put in pieces like this one, which was given me by the artist some years ago, they're not included in the magpie purchase; they're sharing from one crafter to another of a piece that's too nifty to sit neglected on my workbench, a piece that should be out in the world having fun making people happy.)