These huge slabs (over 20 pounds each) are etched with some of the most beautiful data I've seen: an x-ray tomography scan of a fossil ammonite: upper Cretaceous species Damesites damesi. They are real museum pieces.

As you can see in the 3D view (click that curly arrow before you decide!) the slabs are book-matched halves of the data. If you'd like one half I recommend the right (second image), but it's your call.

These are made to order, and will require about two weeks to ship. Price is for 1 slab or base: if you'd like both halves, get two of each.

Paperweight-size ammonites are here.