All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity!
Specimen: Gastrolith (Stomach Stone)
Age: Morrson Formation, Jurassic Period
Location Found: Colorado, USA
Gastroliths are stones from a dinosaurs gastrointestinal tract. Stones would have been ingested by the dinosaur then retained in the muscular gizzard and used to help grind food down.
Such stones are identified by ensuring all three of the following are true: Firstly, the stone is unlike the rock found in its geological vicinity. Secondly, these stones are both rounded and polished from where they turned and tumbled around inside the dinosaur, and finally, these stones are found with the fossils of the dinosaur which ingested it. This provides enough evidence that these are genuine stomach stones.SIMILAR TO SEEN: The image shows an example of the single specimen you will receive. This will be picked from our stock box graded and with a size within the minimum and maximum size range indicated. It will not be the exact specimen in the photo, the colours, shape, size and style may vary as with any natural item. To guarantee the specimen you receive will be representative by that in photo.