This Specimen has been sold.
2.8" Detailed Morocops Trilobite - Multi-Colored Shell
This is a 2.8" long Morocops trilobite from Ofaten, Morocco. It's laid out prone with very nice preparation and eye facet preservation. The multi-toned shell coloration is natural and due to part of the trilobite being closer to a fault in the rock allowing hydrothermal fluids to leach minerals from the shell.
Trilobites were a very diverse group of extinct marine arthropods. They first appeared in the fossil record in the Early Cambrian (521 million years ago) and went extinct during the Permian mass extinction (250 million years ago). They were one of the most successful of the early animals on our planet with over 25k currently described species, filling nearly every evolutionary niche. Due in large part to a hard exoskeleton (shell), they left an excellent fossil record.