This is a lot of two (2) fossilized "spine cookies" that were recovered from the Peace River, Bone Valley Formation, Hawthorn Group, Florida. This area has rich deposits of Miocene to Pleistocene fossils (approx. 11,000 to 23,500,000+ years ago). These specimens are a portion of the spinal vertebra "cap" that is present on many vertebrate spine sections. These flat discs or caps will become seperated from the rest of the vertebra and are found on their own. These are often called "cookies" by fossil hunters. These specimens have been nicely polished by river action and are well-preserved, but there is no way of determining what species they originated from.
Refer to the photo. The black centimeter cube is shown for scale and is not included. You are purchasing both of the specimens shown.