Ammonites were free-swimming mollusks of the ancient oceans, living around the same time that the dinosaurs walked the Earth and disappearing during the same extinction event. They came in a range of sizes, from tiny species only a couple of centimeters across, to large ones reaching over two meters in diameter. The animal would have lived in the last and largest of a chain of spiraled chambers. Filling these chambers with fluid or gas allowed the ammonite to sink like a stone to avoid predators, though ammonite shells with tooth marks on them have been found, evidence that it didn't always work. Fossilized shells are usually, but not always, beautiful spirals. These Fossils are between 135-195 million years old.
Craspedites is a species of ammonite that lived during the Late Jurassic and Early Cretaceous, found in Russia. This spectacular ammonite has chambers preserved as grayish-white Calcite crystals, with the septa (divisions) between each chamber preserved as black Calcite, it is this delicate suturing for which these ammonites are well known. This specimen preserved a small part of its nacreous shell, displaying beautiful bright and iridescent colors.
- Dimensions: 45 mm x 75 mm x 65 mm
- Genuine fossil.
- This item includes an information card about the fossil.
- A certificate of authenticity is included with this item.
This fossil requires special care - exposure to water and other chemicals, such as cleaning products or aerosols, will damage it over time. If you polish the stone, use a dry cloth only, or an air duster that does not contain any disinfectant or other chemicals.
*This fossil is genuine and no two are exactly alike. The item you receive may have slight variations from the one photographed. The last picture is an example of possible variations. If you wish to see the item before purchase, please email us at firstname.lastname@example.org.