5" Polished Dinosaur Bone (Gembone) Section - Utah

This is a 3.6" piece of agatized, dinosaur bone from the Morrison Formation, Utah. One side has been polished to a gloss finish. This specimen has regular cell structure with little variation in size. The small cells would be indicative of a non-theropod dinosaur.

Agatized dinosaur bone is a rare form of fossilized dinosaur bone where the original fossilized bone has been re-mineralized (replaced) with silica based compounds (agate, jasper, chalcedony, or opal).