It's Lizbeth size 20, colors 129 (Purple Splendor), 632 (which is called Medium Purple, but is really lavender), and 633 (Dark Purple). The pattern is by Jon Yusoff.
This bookmark was much easier to make than it looks. You just tat normally, and at the end of round 1, twist the chains around each other before you join the end back to the beginning. The proportions of the thing make the chains want to twist around each other anyway. Then the rings of round 2 join in between the rings of round 1 to stabilize it, and round 3 is just an outline. I am of the opinion that a bookmark needs some kind of tail to stick out of the book, so I added a row of split rings the same size as the rings in the pattern, and finished it off with a little doo-bob (that's a technical term) at the end.
I absolutely love Jon's patterns. They are always unique and fresh-looking, the proportions are perfect, and her diagrams are clear and easy to follow.
With the leftover thread, I made another of Lady Shuttle Maker's treble clefs.
It went much faster this time, partly because I had enough thread to use shuttles, and partly because I knew what to expect.
And finally, I've started the next bookmark.
See that knot I've got coming up in the ball thread? Since the ball thread is always the ball thread in this pattern, it will be easy enough to work around. It's not just an accidental tangle, it's actually two ends of thread tied together. I guess it happens from time to time. This is, of course, Anniversary from Tatting with Visual Patterns by Mary Konior and will serve as my tribute to her.