Truly an ancient and beautiful find are the fossil known as Ammonite. These are polished and lovely for artisan earrings. They are from the Paleozoic and Mesozoic eras - 66-400 million years ago!
I've paired them with a bead called a yo-yo bead which has no hole, just a channel along the outside. Time feels like a yo-yo to me, especially during the pandemic years. The days seem to stretch and yet if you ask me how long ago something happened the years collapse.
* Niobium earwires - hypoallergenic
2 5/8" from top of earwire to bottom of ammonite.