What Does Dinosaur Coprolite Smell Like? Surprisingly, dinosaur coprolite does not retain any odor. Over millions of years, the organic material in dinosaur droppings is replaced by minerals in a process called permineralization, which eliminates any original smell. What you’re left with is a rock-like fossil that looks intriguing but is completely odorless. For fossil collectors and enthusiasts in the United States, this means you can safely handle and display coprolites without worrying about any unpleasant smells. The lack of odor also underscores the transformation these fossils have undergone, turning what was once organic waste into a piece of history that can be studied, collected, and admired. So, while the thought of ancient poop might make you wrinkle your nose, rest assured that dinosaur coprolites are as odorless as any other rock, making them a fascinating and odor-free addition to any fossil collection.