Please don’t ask which dinosaur they came from because it is almost impossible to tell. These are authentic pieces of dinosaur bone from the Morrison Formation here in Utah. They are very common and referred to by the locals as “blue bone” because of the light blue hue. You can see the cell structure in all pieces. Some of the bones have an outer coating. The cells are filled with colorful minerals, so this is a great example of a mineral replacement fossil.
Demos and Labs: Fossil Profile: Dinosaur Bone. Dinosaur Tracks in Texas, Dinosaur Tracks in Utah