Fossil Collections for Sale. We offer a small, but nice selection of framed, instant fossil collections. Whether it is an dinosaur egg shell collection, or a shark and fish tooth collection we are certain you will find something to add to your collection or to give as a gift to ignite that fossil spark in someone special. These are all genuine fossils included in the fossil collections for sale.  What exactly is a fossil?  A fossil is a remnant, impression, or trace of an animal or plant of a past geologic age that has been preserved in Earth’s crust.  For instance, dinosaur bones or footprints.