20 Gastroliths including 5 larger and 15 smaller. Largest is 3" x 3.5" . Dinosaur gizzard stone from Jurassic Period, Morrison Formation from Big Horn Basin, Wyoming .
These sought after colorful highly polished, well rounded stones are also known as "gizzard stones" or "stomach stones" and have been found with the remains of many extinct dinosaurs. They are similar to the small pebbles and gravel found in the gizzards of chickens and other birds. It is assumed that these stones were used to grind up the stomach contents of these reptiles, thus aiding in their digestion.
From the Estate of Frank Hall owner of Dover Scientific and collector of rocks, crystals, minerals and fossils.

Notice to bidders: The absence of a condition report does not imply that the lot is in perfect condition. Photos are considered part of the condition report. Complete condition information is available by request, no later than 24 hours prior to the auction. All lots are offered and sold "as is", and Willow Auctions will not provide refunds based on condition. Timepiece movements, lighting and electrics have not been tested, and art has not been examined out of the frame unless otherwise stated.