Is Fossilized Dinosaur Poop Rare? Fossilized dinosaur poop, or coprolites, can indeed be rare, depending on the species and the preservation conditions. While not every dinosaur’s droppings turned into a fossil, the ones that did offer invaluable insights into the ancient world. The rarity of a coprolite increases if it comes from a rare or well-known dinosaur species, or if it’s particularly large or well-preserved. For collectors in the United States, owning a rare coprolite can be a point of pride, adding significant value to a collection. These fossils are not just relics of the past; they are scientific treasures that help us understand more about the diets, behaviors, and environments of dinosaurs. As such, rare coprolites are highly prized in the world of paleontology, making them a worthwhile investment for serious collectors and enthusiasts.