I have started this discussion to get some answers to the following questions, but we can have also have some fun if you show us your most colorful fossils.   Can you explain why some fossils are gray and some are colored? What are the process that give fossils  colors? Can we deduce something about the environment the organism was living in ?   For example, the following fossils were found about 1 km apart in the Lorraine Group portion of the Nicolet River Formatio